TRAXXAS 39086-4 User guide

MODEL 39086-4

owner’s manual

INTRODUCTION

3 BEFORE YOU

PROCEED

3 SAFETY

PRECAUTIONS

5 TOOLS, SUPPLIES

AND REQUIRED

EQUIPMENT

6 E-MAXX BRUSHLESS

EDITION OVERVIEW

7 QUICK START:

GETTING UP

TO SPEED

8 TRAXXAS TQ

RADIO SYSTEM

15 ADJUSTING

THE ELECTRONIC

SPEED CONTROL

16 DRIVING YOUR

MODEL

20 TUNING

ADJUSTMENTS

25 MAINTAINING

YOUR MODEL

i

Thank you for purchasing the new Traxxas E-Maxx Brushless
Edition electric monster truck. When it comes to gut-wrenching,
wheelie-popping monster torque, nothing comes close to E-Maxx.
We are confident you will appreciate the latest performance
and appearance enhancements that have been made to this
legendary model.

This manual contains the instructions you will need to operate,
and maintain your model so that you can enjoy it for years to
come. We want you to feel confident that you own one of the
best-performing models in the market and that it is backed by
a team of professionals who aim to provide the highest level of
factory support possible. Traxxas models are about experiencing
total performance and satisfaction, not just with your model, but
also with the company that stands behind it.

We know you’re excited about getting your new model on
the road, but it’s very important that you take some time to
read through the Owners Manual. This manual contains all the
necessary set-up and operating procedures that allow you to
unlock the performance and potential that Traxxas engineers
designed into your model. Even if you are an experienced R/C

enthusiast, it’s important to read and follow the procedures in
this manual.

Thank you again for going with Traxxas. We work hard every day
to assure you the highest level of customer satisfaction possible.
We truly want you to enjoy your new model!

Traxxas Support

Traxxas support is with you every step of the
way. Refer to the next page to find out how to
contact us and what your support options are.

Quick Start

This manual is designed with a Quick
Start path that outlines the necessary
procedures to get your model up
and running in the shortest time possible. If you are an
experienced R/C enthusiast you will find it helpful and fast.
Be sure and read through the rest of the manual to learn
about important safety, maintenance, and adjustment
procedures. Turn to page 7 to begin.

REGISTERING YOUR MODEL

In order to serve you better as our customer, please
register your product within 10 days of your purchase
online at Traxxas.com/register.

Traxxas.com/register

26 TQi ADVANCED

TUNING GUIDE

2 • E-MAXX BRUSHLESS

FCC Compliance

This device contains a module that complies with the limits for a Class B digital device as described in part 15 of the FCC rules. Operation is subject to the following two conditions: (1) This device may not cause
harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

The limits for a Class B digital device are designed to provide reasonable protection against harmful interference in residential settings. This product generates, uses and can radiate radio frequency energy, and, if
not operated in accordance with the instructions, may cause harmful interference to radio communications. The user is cautioned that changes or modifications not expressly approved by the party responsible for
compliance could void the user’s authority to operate the equipment.

Canada, Industry Canada (IC)

This Class B digital apparatus complies with Canadian ICES-003 and RSS-210. This device complies with Industry Canada license exempt RSS standard(s). Operation is subject to the following two conditions: This
device may not cause interference, and this device must accept any interference, including interference that may cause undesired operation of the device.

Radio Frequency (RF) Exposure Statement

This equipment complies with radio frequency exposure limits set forth by FCC and Industry Canada for an uncontrolled environment. This equipment should be installed and operated with a minimum distance of
20 centimeters between the radiator and your body or bystanders and must not be co-located or operated in conjunction with any other antenna or transmitter.

BEFORE YOU PROCEED

Carefully read and follow all instructions in this and any
accompanying materials to prevent serious damage to your
model. Failure to follow these instructions will be considered
abuse and/or neglect.

Before running your model, look over this entire manual and
examine the model carefully. If for some reason you decide it is not
what you wanted, then do not continue any further. Your hobby

dealer absolutely cannot accept a model for return or exchange
after it has been run.

Warnings, Helpful Hints, & Cross-References

Throughout this manual, you’ll notice warnings and helpful hints
identified by the icons below. Be sure to read them!

An important warning about personal safety or avoiding
damage to your model and related components.

Special advice from Traxxas to make things easier
and more fun.

Refers you to a page with a related topic.

SUPPORT

If you have any questions about your model or its operation,
call the Traxxas Technical Support line toll-free at:
1-888-TRAXXAS (1-888-872-9927)*

Technical support is available Monday through Friday from 8:30am
to 9:00pm central time. Technical assistance is also available at Traxxas.
com. You may also e-mail customer support with your question at
[e-mail]. Join thousands of registered members in our
online community at Traxxas.com.

Traxxas offers a full-service, on-site repair facility to handle any
of your Traxxas service needs. Maintenance and replacement
parts may be purchased directly from Traxxas by phone or online
at BuyTraxxas.com. You can save time, along with shipping
and handling costs, by purchasing replacement parts from your
local dealer.

Do not hesitate to contact us with any of your product support needs.
We want you to be thoroughly satisfied with your new model!

*Toll-free support is available to U.S. residents only.

SAFETY PRECAUTIONS

All of us at Traxxas want you to safely enjoy your new model. Operate your
model sensibly and with care, and it will be exciting, safe, and fun for you and
those around you. Failure to operate your model in a safe and responsible
manner may result in property damage and serious injury. The precautions
outlined in this manual should be strictly followed to help ensure safe
operation. You alone must see that the instructions are followed and the
precautions are adhered to.

Important Points to Remember

• Your model is not intended for use on public roads or congested areas where
its operation can conflict with or disrupt pedestrian or vehicular traffic.

• Never, under any circumstances, operate the model in crowds of people. Your
model is very fast and could cause injury if allowed to collide with anyone.

• Because your model is controlled by radio, it is subject to radio interference
from many sources that are beyond your control. Since radio interference can
cause momentary losses of radio control, always allow a safety margin in all
directions around the model in order to prevent collisions.

• The motor, battery, and speed control can become hot during use. Be careful
to avoid getting burned.

• Don’t operate your model at night, or anytime your line of sight to the model
may be obstructed or impaired in any way.

• Most importantly, use good common sense at all times.

Batteries and Battery Charging

Your model uses rechargeable batteries that must be handled with care for
safety and long battery life. Make sure to read and follow all instructions and
precautions for charging and maintaining the batteries. It is your responsibility
to charge and care for the battery packs properly. In addition to your battery
and charger instructions, here are some more tips to keep in mind.

• Do not charge batteries inside of an automobile. Do not charge batteries
while driving in an automobile.

• Never charge batteries on wood, cloth, carpet or on any other flammable
material.

• Do not operate the charger in a cluttered space, or place objects on top of the
charger or battery.

• If a battery gets hot to the touch during the charging process (temperature
greater than 140°F / 60°C), disconnect the battery from the charger and
discontinue charging immediately.

• Always store battery packs safely out of the reach of children and pets.

• Do not short-circuit the battery pack. This may cause burns and severe
damage to the battery pack and create the risk of fire.

• Do not expose the charger to water or moisture.

• Do not disassemble the charger.

• Never leave batteries to charge unattended.

• Remove the battery from the model while charging.

Traxxas
6250 Traxxas Way
McKinney, TX 75070
Phone: [phone]
Toll-free 1-888-TRAXXAS

Internet
Traxxas.com
E-mail: [e-mail]

Entire contents ©2016 Traxxas.
Traxxas, Ready-To-Race, Ready­To-Win, E-Maxx and ProGraphix
are trademarks or registered
trademarks of Traxxas. Other
brand names and marks are
the property of their respective
holders and are used only for
purposes of identification. No
part of this manual may be
reproduced or distributed in print
or electronic media without the
express written permission of
Traxxas. Specifications are subject
to change without notice.

1

E-MAXX BRUSHLESS • 3

bluehighway font

Choose the Model That is Right For You. For individual Models

No previous experience with radio controlled models is required.
Models require a minimum of setup, maintenance, or support equipment.

Previous experience with radio controlled models is recommended.
Models require a higher level of setup, maintenance, or support equipment.

No previous experience with radio controlled models is required.
Model requires a minimum of setup, maintenance, or support equipment.

Previous experience with radio controlled models is recommended.
Model requires a higher level of setup, maintenance, or support equipment.

BELOW TEXT HAS BEEN UPDATED on 3-14-07
Kent wants maintenance text to be at the END of the paragraph.-- KB

3600

1500

3600

SAFETY PRECAUTIONS

All instructions and
precautions outlined in this
manual should be strictly
followed to ensure safe
operation of your model.

This model is not intended
for use by children under
14 years of age without the
supervision of a responsible
and knowledgeable adult.

Previous experience with
radio controlled models
is recommended. Models
require a higher level of
setup, maintenance, or
support equipment.

• Always unplug the battery from the electronic speed control when the model
is not in use and when it is being stored or transported.

• Allow the battery pack to cool off between runs (before charging).

• Children should have responsible adult supervision when charging and
handling batteries.

• Do not use battery packs that have been damaged in any way.

• Do not use battery packs that have damaged wiring, exposed wiring, or a
damaged connector.

• Do not short-circuit the battery pack. This may cause burns and severe damage
to the battery pack.

• Do not burn or puncture the batteries. Toxic materials could be released. If eye
or skin contact occurs, flush with water.

• Store the battery pack in a dry location, away from heat sources and direct sunlight.

• Nickel Metal Hydride batteries must be recycled or disposed of properly.

Recycling Your Traxxas Power Cell NiMH Battery

Traxxas strongly encourages you to recycle your Power Cell NiMH battery when
it has reached the end of its useful life. Do not throw your battery in the trash.
All Power Cell NiMH battery packs display the RBRC (Rechargeable Battery
Recycling Corporation) icon, indicating they are recyclable. To find a recycling
center near you, ask your local hobby dealer or visit www.call2recycle.org.

Speed Control

Your model’s electronic speed control (ESC) is an extremely powerful
electronic device capable of delivering high current. Please closely follow these
precautions to prevent damage to the speed control or other components.

• Disconnect the Batteries: Always disconnect the batteries from the speed

control when not in use.

• Transmitter on First: Switch on your transmitter first before switching on the

speed control to prevent runaways and erratic performance.

•

Always adhere to the minimum
and maximum limitations
of the ESC as stated in the
specifications table. Do not mix

battery types and capacities.
Use the same voltage and
capacity for both batteries.
Using mismatched battery
packs could damage the
batteries and electronic speed
control.

1500

Do not mix battery
capacities. Use two

batteries with the

same capacity.

Do not use a 6-cell 7.2V
battery in combination

with a 7-cell battery

8.4V pack.

• Insulate the Wires: Always insulate exposed or damaged wiring with heat
shrink tubing to prevent short circuits

• Don’t Get Burned: The ESC and motor can become extremely hot during use,
so be careful not to touch them until they cool. Supply adequate airflow for
cooling.

• Use the Factory-Installed Connectors: Do not change the battery and motor
connectors. Improper wiring can cause fire or damage to the ESC. Please note
that modified speed controls can be subject to a rewiring fee when returned
for service.

• No Reverse Voltage: The speed control is not protected against reverse
polarity voltage.

• No Schottky Diodes: External Schottky diodes are not compatible with
reversing speed controls. Using a Schottky diode with the ESC will damage
the ESC and void the 30-day warranty.

LiPo Batteries

Lithium Polymer (LiPo) batteries are becoming popular for use in R/C models
due to their compact size, high energy density, and high-current output.
However, these types of batteries require special care and handling procedures
for long life and safe operation. WARNING: LiPo batteries are intended only for

advanced users that are educated on the risks associated with LiPo battery
use. Traxxas does not recommend that anyone under the age of 14 use or
handle LiPo battery packs without the supervision of a knowledgeable and
responsible adult.

Your model is able to use LiPo batteries with nominal voltage not to exceed 11.1
volts (3S packs). LiPo batteries have a minimum safe discharge voltage threshold
that should not be exceeded. The MXL-6s electronic speed control is equipped
with built-in Low-Voltage Detection that alerts the driver when LiPo batteries
have reached their minimum voltage (discharge) threshold. It is the driver’s

responsibility to stop immediately to prevent the battery pack from being
discharged below its safe minimum threshold.

Low-Voltage Detection on the speed control is just one part of a comprehensive
plan for safe LiPo battery use. It is critical for you, the user, to follow all

other instructions supplied by the battery manufacturer and the charger
manufacturer for proper charging, use, and storage of LiPo batteries. Make
sure you understand how to use your LiPo batteries. Be aware that Traxxas

shall not be liable for any special, indirect, incidental, or consequential damages
arising out of the installation and/or use of LiPo batteries in Traxxas models. If

you have questions about LiPo battery usage, please consult with your local
hobby dealer or contact the battery manufacturer. As a reminder, all batteries

should be recycled at the end of their useful life.

4 • E-MAXX BRUSHLESS

TOOLS, SUPPLIES AND REQUIRED EQUIPMENT

Your model comes with a set of specialty metric tools. You’ll need to purchase other items, available from your hobby dealer, to operate
and maintain your model.

Supplied Tools and Equipment

1.5mm “L”
wrench

17mm wheel

wrench

Foam battery

spacers

Required Equipment (not included)

2.0mm “T”
wrench

Universal

wrench

2.5mm “L”
wrench

Body
clips

8mm/5mm

wrench

Pre-load spacers and

shock pistons

Antenna nut

wrench

Optional pinion

gear

Suspension

multi-tool

For more information on
batteries, see Use the Right
Batteries on page 11.

A peak-detecting charger
is recommended for best
performance and longest
battery life. See Traxxas.com
for more information.

Recommended Equipment

These items are not required
for the operation of your
model, but are a good idea to
include in any R/C toolbox:

• Safety glasses

• Traxxas Ultra Premium Tire
Glue, part #6468 (CA glue)

• Hobby knife

• Side cutters and/or needle
nose pliers

• Philips screwdriver

• Soldering iron

4 AA alkaline

batteries

packs with Traxxas High-Current Connectors

EZ-Peak™ Dual

(part #2972)

Battery chargerTwo 7-cell NiMH battery packs or two 2S/3S LiPo battery

*Battery and charger style is subject to change and may vary from images.

E-MAXX BRUSHLESS • 5

E-MAXX BRUSHLESS EDITION OVERVIEW

Half Shaft

Toe Link

Rear Body Mount

Skid Plate

Rear Bumper

Wheelie Bar

Traxxas High-

Current Connector

Electronic Speed Control

Battery Hold-Down

Battery Compartment

Motor Spur Gear

Hex Hub Pivot Ball Axle Carrier

Pinion Gear

Toe Link

Front Suspension Arm

Front Body Mount

Receiver Box

Front Differential

Front Bumper

Rear Differential

Rear Bulkhead

Rear Shock Tower

Rear Suspension Arm

6 • E-MAXX BRUSHLESS

Chassis

Slipper Clutch

Transmission

LED Light Pipe

Antenna

Mount

Steering

Servos

Skid Plate

Front Bulkhead

Front Shock Tower

Shock

QUICK START: GETTING UP TO SPEED

The following guide is an overview of the procedures for getting your model running. Look for the Quick Start logo on the bottom
corners of Quick Start pages.

1. Read the safety precautions on pages 3-4 6. Check servo operation • See page 13

For your own safety, understand where carelessness and misuse
could lead to personal injury.

2. Charge the battery packs • See page 11 7. Range test the radio system • See page 14

Your model requires two battery packs and a compatible battery
charger (not included). Never use a NiMH or NiCad charger to
charge LiPo batteries.

3. Install batteries in the transmitter • See page 11 8. Detail your model • See page 8

The transmitter requires 4 AA alkaline batteries (sold separately). Apply other decals if desired.

4. Install battery packs in the model • See page 12 9. Drive your model • See page 16

Your model requires two fully charged battery packs
(not included).

5. Turn on the radio system • See page 12 10. Maintain your model • See page 25

Make a habit of turning the transmitter on first, and off last. Follow these critical steps to maintain the performance

Make sure the steering servos are working correctly.

Follow this procedure to make sure your radio system works properly
at a distance and that there is no interference from outside sources.

Driving tips and adjustments for your model.

of your model and keep it in excellent running condition.

The Quick Start Guide is
not intended to replace the
full operating instructions
available in this manual.
Please read this entire
manual for complete
instructions on the proper
use and maintenance of
your model.

Look for the Quick Start
logo at the bottom of
Quick Start pages.

E-MAXX BRUSHLESS • 7

TRAXXAS TQi RADIO SYSTEM

Applying the Decals

The main decals for your
model have been applied at
the factory. The decals are
printed on self-adhesive clear
mylar and are die-cut for easy
removal. Use a hobby knife to
lift the corner of a decal and
lift it from the backing.

To apply the decals, place
one end down, hold the
other end up, and gradually
smooth the decal down with
your finger as you go. This
will prevent air bubbles.
Placing both ends of the
decal down and then trying
to smooth it out will result
in air pockets. Look at the
photos on the box for typical
decal placement.

8

8 • E-MAXX BRUSHLESS

INTRODUCTION

Cogging - Cogging is a condition sometimes associated with

Your model includes the latest Traxxas TQi 2.4GHz transmitter with
Traxxas Link™ Model Memory. The transmitter’s easy-to-use design
provides instant driving fun for new R/C enthusiasts, and also offers
a full compliment of pro-level tuning features for advanced users
– or anyone interested in experimenting with the performance of
their model. The steering and throttle channels feature adjustable

Current - Current is a measure of power flow through the

Exponential, End Points, and Sub-Trims. Steering and braking Dual
Rate are also available. Many of the next-level features are controlled
by the Multi-Function knob, which can be programmed to control
a variety functions. The detailed instructions (page 26) and Menu

ESC (Electronic Speed Control) - An electronic speed control is

Tree (page 29) included in this manual will help you understand and
operate the advanced functions of the new TQi radio system. For
additional information and how-to videos, visit Traxxas.com.

RADIO AND POWER SYSTEM TERMINOLOGY

Please take a moment to familiarize yourself with these radio and
power system terms. They will be used throughout this manual.
A detailed explanation of the advanced terminology and features
of your new radio system begins on page 26.

2.4GHz Spread Spectrum – This model is equipped with the latest
R/C technology. Unlike AM and FM systems that require frequency
crystals and are prone to frequency conflicts, the TQ 2.4GHz system
automatically selects and locks onto an open frequency, and offers
superior resistance to interference and “glitching.”

BEC (Battery Eliminator Circuit) - The BEC can either be in the

receiver or in the ESC. This circuit allows the receiver and servos
to be powered by the main battery pack in an electric model.
This eliminates the need to carry a separate pack of 4 AA
batteries to power the radio equipment.

Brushless Motor - A D/C brushless motor replaces the brushed

motor’s traditional commutator and brush arrangement with
intelligent electronics that energize the electromagnetic
windings in sequence to provide rotation. Opposite of a brushed
motor, the brushless motor has its windings (coils) on the
perimeter of the motor can and the magnets are mounted to the
spinning rotor shaft.

Frequency band - The radio frequency used by the transmitter to

kV Rating - Brushless motors are often rated by their kV number.

LiPo - Abbreviation for Lithium Polymer. Rechargeable LiPo

mAh – Abbreviation for milliamp hour. A measure of the capacity

Neutral position - The standing position that the servos seek

NiCad - Abbreviation for nickel-cadmium. The original rechargeable

brushless motors. Typically it is a slight stutter noticed when
accelerating from a stop. It happens for a very short period as
the signals from the electronic speed control and the motor
synch with each other.

electronics, usually measured in amps. If you look at wire like a
garden hose, current is a measure of how much water is flowing
through the hose.

the electronic motor control inside the model. Electronic speed
controls use power more efficiently than mechanical speed
controls so that the battery runs longer. An electronic speed
control also has circuitry that prevents loss of steering and
throttle control as the battery loses its charge.

send signals to your model.

This model operates on the 2.4GHz

direct-sequence spread spectrum.

The kV rating equals no-load motor rpm with 1 volt applied.
The kV increases as the number of wire turns in the motor
decreases. As the kV increases, the current draw through the
electronics also increases.

battery packs are known for their special chemistry that allows
extremely high energy density and current handling in a
compact size. These are high performance batteries that require
special care and handling. For advanced users only.

of the battery pack. The higher the number, the longer the
battery will last between recharges.

when the transmitter controls are at the neutral setting.

hobby pack, NiCad batteries have very high current handling, high
capacity, and can last up to 1000 charging cycles. Good charging
procedures are required to reduce the possibility of developing a
“memory” effect and shortened run times.

TRAXXAS TQi RADIO SYSTEM

NiMH - Abbreviation for nickel-metal hydride. Rechargeable

NiMH batteries offer high current handling, and much greater
resistance to the “memory” effect. NiMH batteries generally
allow higher capacity than NiCad batteries. They can last up to
500 charge cycles. A peak charger designed for NiMH batteries is
required for optimal performance.

Receiver - The radio unit inside your model that receives signals

from the transmitter and relays them to the servos.

Resistance - In an electrical sense, resistance is a measure of how

an object resists or obstructs the flow of current through it.
When flow is constricted, energy is converted to heat and is
lost. Traxxas power systems are optimized to reduce electrical
resistance and the resulting power-robbing heat.

Rotor - The rotor is the main shaft of the brushless motor.

In a brushless motor, the magnets are mounted to the
rotor, and the electromagnetic windings are built into the
motor housing.

Sensored - Sensored refers to a type of brushless motor that

uses an internal sensor in the motor to communicate rotor
position information back to the electronic speed control.

Sensorless - Sensorless refers to a brushless motor that uses

advanced instructions from an electronic speed control to
provide smooth operation. Additional motor sensors and wiring
are not required.

Servo - Small motor unit in your model that operates the

steering mechanism.

Solder Tabs - Accessible, external contacts on the motor that

allows for easy wire replacement.
Transmitter - The hand-held radio unit that sends throttle and
steering instructions to your model.

Trim - The fine-tuning adjustment of the neutral position of the

servos, made by adjusting the throttle and steering trim sliders
on the face of the transmitter.

Thermal Shutdown Protection - Temperature sensing electronics

used in the electronic speed control detect overloading and
overheating of the transistor circuitry. If excessive temperature is
detected, the unit automatically shuts down to prevent damage
to the electronics.

2-channel radio system - The TQ radio system, consisting of

the receiver, the transmitter, and the servos. The system uses two
channels: one to operate the throttle and one to operate
the steering.

Voltage - Voltage is a measure of the electrical potential

difference between two points, such as between the positive
battery terminal and ground. Using the analogy of the garden
hose, while current is the quantity of water flow in the hose,
voltage corresponds to the pressure that is forcing the water
through the hose.

IMPORTANT RADIO SYSTEM PRECAUTIONS

• Do not kink the receiver’s antenna wire. Kinks in the antenna wire
will reduce range.

• DO NOT CUT any part of the receiver’s antenna wire. Cutting the
antenna will reduce range.

• Extend the antenna wire in the model as far as possible for
maximum range. It is not necessary to extend the antenna wire out
of the body, but wrapping or coiling the antenna wire should be
avoided.

• Do not allow the antenna wire to extend outside the body without
the protection of an antenna tube, or the antenna wire may get
cut or damaged, reducing range. It is recommended to keep the
wire inside the body (in the antenna tube) to prevent the chance
of damage.

To prevent loss of radio range
do not kink or cut the black wire,
do not bend or cut the metal tip,
and do not bend or cut the white
wire at the end of the metal tip.

Correct

NoNo No

E-MAXX BRUSHLESS • 9

TRAXXAS TQi RADIO SYSTEM

Wiring Diagram

MXL-6s Electronic Speed Control
Specifications:

Cells ................................. 18 NiCad / NiMH 6s LiPo

Resistance...................... 0.0003 Ohms per phase

Brake ......... Proportional with adjustable curve

Reversible ...................................Yes - with lockout

Low Voltage Cutoff ......................Programmable

Case Size .........................................2.2" x 1.9" x 1.4"

Weight with Wires ............................................ 121g

Connector Type ................................6.5mm bullet

Your model is equipped with the TQi 2.4GHz transmitter with the Traxxas Link Wireless Module. The transmitter has two channels for
controlling your throttle and steering. The receiver inside the model has 5 output channels. Your model is equipped with two servos and an
electronic speed control.

TRANSMITTER AND RECEIVER

Set Button

Red/Green Status LED

see page 27 for more info

Throttle Neutral

Adjust

Steering Wheel

MODEL WIRING DIAGRAM

Channel 1
Steering Servos

Menu Button

Antenna

Steering
Trim

Multi-Function
Knob

Throttle
Trigger

Link
Button

Sensor Expansion

Port**

Receiver

BAT T/
CH5 - Battery/Channel 5*

CH4 - Channel 4*
CH3 - Speed Control Fan
CH2 - Speed control
CH1 - Steering Servo
CH1 - Steering Servo

*Not used

Motor

High-Current
Connector

LED

Channel 2

MXL-6s Electronic

Speed Control

10 • E-MAXX BRUSHLESS

Power Switch Battery Compartment

**Accessory sensor expansion port for use with the Telemetry Expander Module
(see Traxxas.com and materials included with your model for more information).

TRAXXAS TQi RADIO SYSTEM

INSTALLING TRANSMITTER BATTERIES

Your TQi transmitter uses 4 AA batteries. The battery
compartment is located in the base of the transmitter.

1. Remove the battery compartment door by pressing the tab
and sliding the door open.

2. Install the batteries in the correct orientation, as indicated
in the battery compartment.

3. Reinstall the battery compartment door and snap it closed.

4. Turn on the transmitter and check the status LED for a solid
green light.

If the status LED flashes red, the transmitter
batteries may be weak, discharged, or
possibly installed incorrectly. Replace with
new batteries. The status LED does not
indicate the charge level of the battery pack
installed in the model. Refer to the Troubleshooting section on
page 27 for more information on the transmitter Status LED
codes.

SELECTING BATTERIES FOR YOUR MODEL

Your model does not include batteries or a charger. Two NiMH or LiPo
batteries equipped with Traxxas High-Current Connectors are required.
LiPo batteries are recommended for best performance. Traxxas Power
Cell batteries are strongly recommended for maximum performance. The
following chart lists all the available Power Cell batteries for your model:

LiPo Batteries

2872X 5000mAh 11.1V 3-Cell 25C LiPO Battery

2843X 5800mAh 7.4V 2-Cell 25C LiPO Battery

2869X 7600mAh 7.4V 2-Cell 25C LiPO Battery

NiMH Batteries

2923X Battery, Power Cell, 3000mAh (NiMH, 7-C flat, 8.4V)

2940X Battery, Series 3 Power Cell, 3300mAh (NiMH, 7-C flat, 8.4V)

2950X Battery, Series 4 Power Cell, 4200mAh (NiMH, 7-C flat, 8.4V)

2960X Battery, Series 5 Power Cell, 5000mAh (NiMH, 7-C flat, 8.4V)

SELECTING A CHARGER FOR YOUR MODEL

Make certain you choose the correct type of charger for the batteries
you select. You MUST use a LiPo charger for LiPo batteries or battery
damage with the potential for fire will result (see Warnings and
Precautions for full details). Traxxas recommends you choose a genuine
Traxxas EZ-Peak iD charger for easy charging and maximum battery life
and performance.

Charger

E Z - P e a k P l u s , 4 - a m p 2 97 0 YE S YES YES

E Z - P e a k D u a l , 8 - a m p 2 9 7 2 YE S YES YES

Part

Number

NiMH

Compatible

LiPo

Compatible Battery iD

If the status LED doesn’t light
green, check the polarity of
the batteries. If you see any
other flashing signal from the
LED, refer to the chart on page
27 to identify the code.

Use the Right Batteries

Your transmitter uses AA
batteries. Use new alkaline
batteries (part #2914). Do
not use rechargeable AA
batteries to power the TQi
transmitter, as they will not
provide sufficient voltage
for optimum transmitter
performance.

Caution: Discontinue running
your model at the first sign of
weak batteries (flashing red
light on the transmitter) to
avoid losing control.

2-4

E-MAXX BRUSHLESS • 11

TRAXXAS TQi RADIO SYSTEM

Battery iD

Traxxas recommended
battery packs are equipped
with Traxxas Battery iD. This
exclusive feature allows
Traxxas battery chargers (sold
separately) to automatically
recognize connected battery
packs and optimize the
charge settings for the
battery. This eliminates
the need to worry over
charger settings and menus
for the easiest and safest
charging solution possible.
Visit Traxxas.com to learn
more about this feature and
available Traxxas iD chargers
and batteries.

The Traxxas
High-Current Connector

Your model is equipped
with the Traxxas High-
Current Connector. Standard
connectors restrict current
flow and are not capable of
delivering the power needed
to maximize the output of
the MXL-6s. The Traxxas
connector’s gold-plated
terminals, with large contact
surfaces, ensure positive
current flow with the least
amount of resistance. Secure,
long-lasting, and easy to
grip, the Traxxas connector
is engineered to extract all
the power your battery has
to give.

INSTALLING BATTERY PACKS

1.

Remove the battery hold-down by pressing on
the release tab and lifting out the hold-down.

2. Install the battery pack with the battery
wires facing the rear of the model.

3. Insert the tabs of the battery hold-down into
the slots in the rear hold-down retainer (A).
Swing the battery hold down towards the
chassis and snap (lock) the end into the front
hold-down retainer (B).

Using Different Battery Configurations

The battery hold-downs are capable of
accommodating
packs or the more common stick packs. The
battery compartments are configured for stick
packs from the factory. The number on each
side of the hold down indicates the battery height in millimeters that
hold-down can accommodate. Note that one side is labeled “25” and
other side is labeled “23”. The 25mm side is for use with typical stick
type battery packs. If you
are using side-by-side
racing packs,
the hold-down over to the
23mm side and use it on the
opposite side of the chassis.
Accessory hold downs and
foam (part #3927X) are
available to accommodate
larger battery packs. See the
39086-4 E-Maxx parts list for
more information.

either side-by-side racing style

Release Tab

“25” - Standard stick packs

simply flip

“23” - Side-by-side packs

25mm side: Standard

NiMH stick pack setup

23mm side: Side-by-side

NiMH pack setup

When using 6-cell battery packs, install the supplied foam block
(spacer) into the front of the battery compartment. The spacers
are located in your instructions package. The spacers are shaped
to conform to the chassis. There is a right and a left. Test fit them to
confirm their location. Remove the backing from the self adhesive
strips and secure them to the front of the battery compartments.

RADIO SYSTEM RULES

• Always turn your TQi transmitter on first and off last. This procedure
will help to prevent your model from receiving stray signals
from another transmitter, or other source, and running out of
control. Your model has electronic failsafes to prevent this type of
malfunction, but the first, best defense against a runaway model is
to always turn the transmitter on first, and off last.

1

Always turn your

transmitter on first.

2

Plug in the batteries.

• Always use new or freshly charged batteries for the radio system.

Weak batteries will limit the radio signal between the receiver and
the transmitter. Loss of the radio signal can cause you to lose control

of your model.

• In order for the transmitter and receiver to bind to one another,
the receiver in the model must be turned on within 20 seconds
of turning on the transmitter. The transmitter LED will flash fast
red indicating a failure to link. If you miss it, simply turn off the
transmitter and start over.

• Always turn on the transmitter before plugging in the battery.

3

Turn on the model.

5

12 • E-MAXX BRUSHLESS

TRAXXAS TQi RADIO SYSTEM

RADIO SYSTEM CONTROLS

T

U

R

N

R

I

G

H

T

T

U

R

N

L

E

F

T

Neutral

Brake/Reverse

Forward

RADIO SYSTEM BASIC ADJUSTMENTS

Throttle Neutral Adjustment

The throttle neutral adjustment is located on the
transmitter face and controls the forward/reverse
travel of the throttle trigger. Change the adjustment
by pressing the button and sliding it to the desired
position. There are two settings available:

50/50: Allows equal travel for both acceleration and reverse.
70/30: Allows more throttle travel (70%) and less reverse travel (30%).

Note:

We strongly recommend to leave this control in its factory
location until you become familiar with all the adjustments and
capabilities of your model.

position, turn the transmitter off before adjusting the neutral position.

You will need to reprogram your electronic speed control to
recognize the 70/30 setting. Turn to Setup Programming on page 15 for

instructions.

To change the throttle neutral adjust

Steering Trim

The electronic steering trim located on the
face of the transmitter adjusts the neutral
(center) point of the steering channel.
Note: Traxxas Stability Management (TSM) must be completely
turned off while adjusting steering trim. See page 14 for TSM
adjustments.

Multi-Function Knob

The Multi-Function knob can be programmed
to control a variety of functions. From the
factory, the Multi-Function knob controls
Traxxas Stability Management (TSM).
For more detail on TSM, refer to page 14.

USING THE RADIO SYSTEM

The TQi Radio System has been pre-adjusted at the factory. The
adjustment should be checked before running the model, in case of
movement during shipping. Here’s how:

1. Turn the transmitter switch on. The status LED on the transmitter
should be solid green (not flashing).

2.

Elevate the model on a block or a stand so that all the tires are

off the ground. Make sure your hands are clear of the moving
parts of the model.

3.

Plug the battery packs in the model into the speed control.

4.

Switch the speed control on. You will hear a short sequence of
tones as ALL the LEDs blink. The sequence will then repeat twice
more, then the YELLOW LED will remain illuminated.

5.

Turn the steering wheel on the transmitter back and forth and
check for rapid operation of the steering servo. Also, check that
the steering mechanism is not loose or binding. If the steering
operates slowly, check for weak batteries.

6.

When looking down at model, the
front wheels should be pointing
straight ahead. If the wheels are
turned slightly to the left or right,
turn off TSM (see page 14) and
slowly adjust the steering trim
control on the transmitter until they are pointing straight ahead;
then, return the multi-function knob to the desired TSM setting.

Using Reverse: While driving,
push the throttle trigger
forward to apply brakes.
Once stopped, return the
throttle trigger to neutral.
Push the throttle trigger
forward again to engage
proportional reverse.

Automatic Failsafe

The TQi transmitter and
receiver are equipped with
an automatic failsafe system
that does not require user
programming. In the event
of signal loss or interference,
the throttle will return to
neutral and the steering will
hold its last commanded
position. If failsafe activates
while you are operating
your model, determine the
reason for signal loss and
resolve the problem before
operating your model again.

Stop immediately at the first
sign of weak batteries. Never
turn the transmitter off
when the battery packs are
plugged in. The model could
run out of control.

6, 7

E-MAXX BRUSHLESS • 13

To prevent loss of radio range
do not kink or cut the black wire,
do not bend or cut the metal tip,
and do not bend or cut the white
wire at the end of the metal tip.

Correct

NoNo No

14 • E-MAXX BRUSHLESS

TRAXXAS TQi RADIO SYSTEM

7.

Gently operate the throttle trigger to ensure that you have forward
and reverse operation, and that the motor stops when the throttle
trigger is at neutral. WARNING: Do not apply full throttle in

forward or reverse while the model is elevated.

8. Once adjustments are made, turn off the receiver on your model,
followed by the hand-held transmitter.

Range-Testing the Radio System

Before each running session with your model, you should range-test
your radio system to ensure that it operates properly.

1.

Turn on the radio system and check its operation as described in

the previous section.

2.

Have a friend hold the model. Make sure hands and clothing are

clear of the wheels and other moving parts on the model.

3.

Walk away from the model with the transmitter until you reach the

farthest distance you plan to operate the model.

4.

Operate the controls on the transmitter once again to be sure that

the model responds correctly.

5.

Do not attempt to operate the model if there is any problem with

the radio system or any external interference with your radio signal
at your location.

Higher Speeds Require Greater Distance

The faster you drive your model, the more quickly it will near the limit
of radio range. At 60mph, a model can cover 88 feet every second!
It’s a thrill, but use caution to keep your model in range. If you want
to see your model achieve its maximum speed, it is best to position
yourself in the middle of the truck’s running area, not the far end,
so you drive the truck towards and past your position. In addition to
maximizing the radio’s range, this technique will keep your model
closer to you, making it easier to see and control.

No matter how fast or far you drive your model, always leave adequate
space between you, the model, and others. Never drive directly toward
yourself or others.

TQi Binding Instructions

For proper operation, the transmitter and receiver must be
electronically ‘bound.’ This has been done for you at the factory.
Should you ever need to re-bind the system or bind to an additional
transmitter or receiver, follow these instructions.

Note: The receiver must be connected to a 4.8-6.0v (nominal) power
source for binding and the transmitter and receiver must be within 5
feet of each other.

1. Press and hold the transmitter’s SET button as you switch the
transmitter on. The transmitter’s LED will flash red slowly.
Release the SET button.

2.

Press and hold the receiver’s LINK button as you switch on the speed
control by pressing the EZ-Set button. Release the LINK button.

3. When the transmitter and receiver’s LEDs turn solid green, the
system is bound and ready for use. Confirm that the steering and
throttle operate properly before driving your model.

TRAXXAS STABILITY MANAGEMENT (TSM)

Traxxas Stability Management or TSM
allows you to experience all the speed
and acceleration that was engineered
into your Traxxas model by helping

you to maintain control of the vehicle
in low-traction situations. TSM helps provide straight ahead full­throttle acceleration on slippery surfaces, without fishtailing, spinouts,
or loss of control. TSM also dramatically improves braking control.
High speed cornering and control is also made possible as TSM
makes corrections for you, without intruding on your fun, or creating
unexpected side effects.

The Multi-Function knob on
the TQi transmitter has been
programmed to control TSM. The
recommended (default) setting
for TSM is to rotate the knob to
the 12:00 position (the zero mark
on the dial).

Turn the knob clockwise to
increase assistance; turn the knob
counterclockwise to decrease
assistance. Turn the
knob counterclockwise to its
stop to turn TSM completely off.
Note: TSM is deactivated
automatically when driving or
braking in reverse.

Recommended setting

Decrease

assistance

TSM off

Increase

assistance

When driving on surfaces with some traction, decrease the TSM
setting to allow the vehicle to feel more “loose” for power sliding,
drifting, and so on. On surfaces with very little traction (loose dirt,
smooth concrete, ice/snow), increase TSM to maximize acceleration
and control.

Drive with TSM on and off to test how it is making your control of the
vehicle easier and more precise. For more information, visit Traxxas.
com/tsm.

Note: TSM must be completely turned off while adjusting steering
trim.

SETTING UP THE ANTENNA

The receiver antenna has been set up and
installed from the factory.

When reinstalling the antenna, first slide
the antenna wire into the bottom of the
antenna tube until the white tip of the
antenna is at the top of the tube under
the black cap. Insert the base of the tube
into the antenna post. Take care not to
crimp the antenna wire. Slide the crimp
nut over the antenna tube and screw it
onto the antenna post. Use the supplied
tool to tighten the crimp nut on the post
just until the antenna tube is securely
in place. Do not overtighten or crush
the antenna wire against the chassis.

Do
not bend or kink the antenna wire! See
the sidebar for more information. Do not
shorten the antenna tube.

Antenna

Tip

Antenna

Tube

Antenna

Nut Wrench

Antenna

Nut

Antenna

Mount

ADJUSTING THE ELECTRONIC
SPEED CONTROL

The MXL-6s speed control should not need reprogramming with
normal use; however, if you install a different radio system in your

model, or change the transmitter’s throttle-neutral setting from 50/50
to 70/30, you will need to reprogram the speed control. Follow these
instructions to reprogram the speed control:

1. Install the batteries of your choice in the battery compartments
and plug the batteries into the speed control.

2. Switch on your transmitter.

3. Hold full throttle while you switch on the MXL-6s controller. After a
few seconds, you will hear multiple tones and the RED LED will light.

4. Hold full brake. After a few seconds, you will hear multiple tones
and the YELLOW LED will light.

5. Release the trigger to the neutral position. After a few seconds,
you will hear multiple tones and ALL THE LEDs will light.

6. Wait a few more seconds for the speed control to ‘arm,’ indicated
by a double-tone. You are now ready to drive.

Disconnect Batteries After Use

Always disconnect the batteries from the speed control when
you are finished using your vehicle. The switch on the speed control
only shuts off power to the receiver and servos. The speed control
continues to draw power as long as it is plugged in and may over-
discharge your batteries if they are left connected to the speed
control.

MXL-6s Specs

Cells:

18 NiCad / NiMH 6s LiPo

Resistance:

0.0003 Ohms per phase

Brake :

Proportional with
adjustable curve

Reversible:
Yes - with lockout

Low Voltage Cutoff:
Programmable

Case Size:

2.2” x 1.9” x 1.4”

Weight with Wires:

121g

Connector Type:

6.5mm bullet

E-MAXX BRUSHLESS • 15

DRIVING YOUR MODEL

9

16 • E-MAXX BRUSHLESS

Now it’s time to have some fun! This section contains instructions on
driving and making adjustments to your model. Before you go on,
here are some important precautions to keep in mind.

• Allow the model to cool for a few minutes between runs. This is
particularly important when using high capacity battery packs
that allow extended periods of running. Monitoring temperatures
will extend the lives of the batteries and motor.

• Do not continue to operate the model with low batteries or you
could lose control of it. Indications of low battery power include
slow operation and sluggish servos (slow to return to center).
Stop immediately at the first sign of weak batteries. When the
batteries in the transmitter become weak, the red power light will
begin to flash. Stop immediately and install new batteries.

• Do not drive the model at night, on public streets, or in large
crowds of people.

• If the model becomes stuck against an object, do not continue to
run the motor. Remove the obstruction before continuing. Do not
push or pull objects with the model.

• Because the model is controlled by radio, it is subject to radio
interference from many sources beyond your control. Since radio
interference can cause momentary losses of control, allow a safety
margin of space in all directions around the model in order to
prevent collisions.

• Use good, common sense whenever you are driving your model.
Intentionally driving in an abusive and rough manner will only
result in poor performance and broken parts. Take care of your
model so that you can enjoy it for a long time to come.

• High performance vehicles produce small vibrations which may
loosen hardware over time. Frequently check wheel nuts and
other screws on your vehicle to ensure that all hardware remains
properly tightened.

Slipper Clutch Break-In

The E-Maxx Brushless Edition’s slipper clutch requires a break-in
procedure to ensure consistent operation with the extremely high
power output of the included MXL-6s brushless motor system. The
slipper clutch has been adjusted to the correct initial setting for
break-in. Follow these steps to ensure maximum performance and
life from your slipper clutch:

1. Make your first runs with the model using the stock gearing and
6- or 7-cell NiMH packs, or 2S LiPo packs.

2. Drive normally. The slipper clutch should slip momentarily
when accelerating aggressively on high-traction surfaces (you
will hear a whirring sound when the slipper clutch allows the spur
gear to slip).

3. If excessive slippage is noticed (slipping that lasts for more
than 3 seconds under hard acceleration), or the slipper clutch
slips anytime the throttle is applied at any lever, stop driving
immediately. Let the slipper clutch cool for 10-15 minutes.
When the clutch is cool, test-drive the vehicle again. If you still
experience excessive slippage, allow the slipper to cool once
more, then tighten the slipper nut ¼ turn (turn the nut clockwise)
and repeat the break-in process. Do not adjust the slipper clutch
before it has cooled.

4. Continue to run the vehicle and monitor slipper clutch
performance as noted above, and readjust if necessary. When the
run is complete, the slipper should be fully broken in.

After break-in, the slipper clutch is ready for any type of driving,
with any batteries up to 6S Lipo. Set the slipper clutch so it only
slips for a moment (if at all) under hard acceleration in high-
traction conditions. If excessive slippage is noticed, stop driving
immediately. Continuing to drive with a loose slipper will cause
damage to the slipper unit. You must let the slipper cool down
to ambient temperature before tightening the slipper nut and
resuming driving.

Make Sure The Axle Nuts Are Tight Before Each Run

Before operating your E-Maxx Brushless
Edition, take a moment to make sure
the axle nuts are tight, as they may have
loosened during shipping. The correct
size axle-nut wrench is supplied with the
truck. Check the tightness of the axle nuts
before each run. The E-Maxx’s high speed
and torque can loosen the nuts over time
if left unchecked.

About Run Time

A large factor affecting run time is the type and condition of
your batteries. The milliamp hour (mAh) rating of the batteries
determines how large their “fuel tank” is. A 3000 mAh battery
pack will theoretically run twice as long as a 1500 mAh sport pack.
Because of the wide variation in the types of batteries that are
available and the methods with which they can be charged, it’s

DRIVING YOUR MODEL

impossible to give exact run times for the model. Another major
factor which affects run time is how the model is driven. Run times
may decrease when the model is driven repetitively from a stop to
top-speed and with repetitive hard acceleration.

Tips for Increasing Run Time

• Use batteries with the highest mAh rating you can purchase.

• Use a high-quality peak-detecting charger.

• Read and follow all maintenance and care instructions provided
by the manufacturer of your batteries and charger.

• Keep the MXL-6s cool. Get plenty of airflow across the ESC.

• Lower your gear ratio. Installing smaller pinion gears will lower
your gear ratio and cause less power draw from the motor and
batteries, and reduce overall operating temperatures. Always
replace both pinion gears together.

• Vary your speed. Continuous high-speed, high-gear running
shortens the run time on the E-Maxx.

• Maintain your model. Do not allow dirt or damaged parts to cause
binding in the drivetrain. Keep the motor clean.

mAh Ratings and Power Output

The mAh rating of the battery can effect your top speed
performance. The higher capacity battery packs experience less
voltage drop under heavy load than low mAh rated packs. The
higher voltage potential allows increased speed until the battery
begins to become discharged.

RUNNING IN WET CONDITIONS

Your new Traxxas model is designed with water-resistant features
to protect the electronics in the model (receiver, servos, electronic
speed control). This gives you the freedom to have fun driving
your model through puddles, wet grass, snow, and through
other wet conditions. Though highly water resistant, the model
should not be treated as though it is submersible or totally 100%
waterproof. Water resistance applies only to the installed electronic
components. Running in wet conditions requires additional care
and maintenance for the mechanical and electrical components to
prevent corrosion of metal parts and maintain their proper function.

Precautions

• Without proper care, some parts of your model can be seriously
damaged due to contact with water. Know that additional
maintenance procedures will be required after running in wet

conditions in order to maintain the performance of your model.
Do not run your model in wet conditions if you are not willing to
accept the additional care and maintenance responsibilities.

• Not all batteries can be used in wet environments. Consult your
battery manufacturer to see if their batteries can be used in wet
conditions. Do not use LiPo batteries in wet conditions.

• The Traxxas TQi transmitter is not water resistant. Do not subject
it to wet conditions such as rain.

• Do not operate your model during a rain storm or other inclement
weather where lightning may be present.

• Do NOT allow your model to come in contact with salt water
(ocean water), brackish water (between fresh water and ocean
water), or other contaminated water. Salt water is highly
conductive and highly corrosive. Use caution if you plan to run
your model on or near a beach.

The cooling fan on the ESC is not water resistant. To avoid

damaging the fan, it must be removed prior to driving your
model in wet conditions. To remove the cooling fan:

1. Remove the cover from the receiver
box and unplug the connector.

2. Reinstall the receiver box cover.

Note: When reinstalling the receiver
box cover, ensure that the O-ring is
properly seated in the groove around
the receiver box (for more information,

see “Receiver Box: Maintaining a
Watertight Seal” on the page 19).

3. Remove the two 3x35mm cap screws
from the ESC mount. Remove the ESC
mount.

4. Release the two tabs on the side of the
fan shroud to remove it from the ESC.

5. Remove the fan from the shroud.

6. Reinstall the shroud on the ESC.

7. Reinstall the ESC mount over the
ESC. Secure the mount with the two
3x35mm cap screws.

E-MAXX BRUSHLESS • 17

DRIVING YOUR MODEL

Before Running Your Vehicle in Wet Conditions

1. Consult the section “After Running Your Vehicle in Wet Conditions”
before proceeding. Make sure you understand the additional
maintenance required with wet running.

2. The wheels have small holes molded in to allow air to enter and exit
the tire during normal running. Water will enter these holes and get
trapped inside the tires if holes are not cut in the tires. Cut two small
holes (3mm or 1/8” diameter) in each tire. Each hole should be near
the tire center-line, 180° apart.

3. Confirm that the receiver box O-ring and cover are installed
correctly and secure. Make sure the screws are tight and the blue
O-ring is not visibly protruding from the edge of the cover.

4. Confirm that your batteries can be used in wet conditions.

5. Use lower gearing (smaller pinion gears, as low as 9T or spur gear as
large as 54T) when running in mud, deep puddles, snow, or other
similar situations that will restrict the tires and put much higher
loads on the motor.

Motor Precautions

• Motor life can be greatly reduced in mud and water. If the motor

gets excessively wet or submerged, use very light throttle (run
the motor slowly) until the excess water can run out. Applying full
throttle to a motor full of water can cause rapid motor failure. Your
driving habits will determine motor life with a wet motor. Do not
submerge the motor under water.

• Do not gear the motor by temperature when running in wet

conditions. The motor will be cooled by water contact and will not
give an accurate indication of appropriate gearing.

• Use special care when operating your model in muddy conditions.

Stop operating your model if it appears to be straining due to the
tackiness of the mud or build-up of mud on the chassis. Do not
allow mud to collect on the motor or pack around the motor.

After Running Your Vehicle in Wet Conditions

1. Drain the tires by spinning the tires at high speed to “sling” the water
out. One way to do this is to make several high-speed passes on a flat,
dry surface, if possible.

2. Remove the batteries.

3. Rinse excess dirt and mud off the truck with low-pressure water,
such as from a garden hose. Do NOT use a pressure washer or
other high pressure water. Avoid directing water into the bearings,
differentials, etc.

4. Blow off the truck with compressed air (optional, but recommended).
Wear safety glasses when using compressed air.

5. Remove the wheels from the truck.

6. Spray all the bearings, drivetrain, and fasteners with WD-40® or similar
water displacing light oil.

7. Let the truck stand or you may blow it off with compressed air. Placing
the truck in a warm, sunny spot will aid drying. Trapped water and oil
will continue to drip from the truck for a few hours. Place it on a towel
or piece of cardboard to protect the surface underneath.

8. As a precautionary step, remove the sealed receiver box cover. While
unlikely, humidity or tiny amounts of moisture or condensation may
enter the receiver box during wet running. This can cause long-term
problems with the sensitive electronics in the receiver. Removing the
receiver box cover during storage allows the air inside to dry. This step
can improve the long-term reliability of the receiver. It is not necessary
to remove the receiver or unplug any of the wires.

9. Additional Maintenance: Increase your frequency of disassembly,
inspection, and lubrication of the following items. This is necessary
after extended wet use or if the vehicle will not be used for an
extended period of time (such as a week or longer). This additional
maintenance is needed to prevent any trapped moisture from
corroding internal steel components.

• Stub axle housing bearings: Remove, clean, and re-oil the bearings.

• Differentials: Remove, disassemble, clean, and re-grease the
differential components. Use a light coating of wheel bearing grease
(from an auto parts store) on the metal gear teeth. Refer to your
exploded view diagrams for help with disassembly and reassembly.

• Motor: After operating your model in wet or muddy conditions,
remove the motor and clean any mud or dirt from the bearings. To
access the rear bearing, remove the plastic cap with thumb pressure,
or gently pry the cap off with a flat-blade screwdriver. To prevent
corrosion and ensure maximum bearing life, lubricate the bearings
with a light oil (available at your local hobby store). Following these
steps will extend motor life and maintain peak performance. Be sure
to wear eye protection when using spray aerosol cleaners.

18 • E-MAXX BRUSHLESS

DRIVING YOUR MODEL

RECEIVER BOX:
MAINTAINING A WATERTIGHT SEAL

Removing and Installing Radio Gear

The unique design of the receiver box allows the removal and
installation of the receiver without losing the ability to maintain a
watertight seal in the box. The patent-pending wire clamp feature
gives you the ability to also install aftermarket radio systems and
maintain the watertight features of the receiver box.

Removing the Receiver

1. To remove the cover, remove the two 3x10mm button-head
cap screws.

2. To remove the receiver from the box, simply lift it out and set to the
side. The antenna wire is still inside the clamp area and cannot be
removed yet.

3. Remove the wire clamp by removing the two 2.8x8mm cap screws.

4. Unplug the servo cables from the receiver and remove the receiver.

Receiver Installation

1. Always install the wires into

the box before installing the
receiver.

2. Install the antenna wire and

the servo cables into the
receiver box.

3. Arrange the wires neatly

using the wire guides in the receiver box.
The excess wire will be bundled inside the
receiver box. Label which wire is for which
channel.

4. Apply small bead of silicone grease

(Traxxas part #1647) to the wire clamp.

5. Install the wire clamp and

tighten the two 2.8x8mm cap
screws securely.

6. Using double-sided adhesive

foam tape, install the receiver
into the box and plug the
wires into receiver. Refer
to page 10 for the wiring
diagram.

Note: For best performance, it is recommended that the receiver be
installed in the original orientation as shown.

7. Make sure the clear plastic light pipe in the receiver box is aligned
above the LED on the receiver.

8. Make sure the O-ring is properly seated into the groove in the
receiver box so that the cover will not pinch it or damage it any
way.

9. Install the cover and tighten the two 3x10mm button-head cap
screws securely.

10. Inspect the cover to make sure that the O-ring seal is not visible.

E-MAXX BRUSHLESS • 19

TUNING ADJUSTMENTS

For easier access to the
rear-most shock mounting
screw, remove the one end
of the rear turnbuckle. In the
front, remove the suspension
pin from the lower front
suspension arm to gain easier
access to the lower shock
mounting screws.

20 • E-MAXX BRUSHLESS

SUSPENSION TUNING

Adjusting the Pivot Ball Caps

The pivot ball caps should be adjusted
so that the pivot balls operate freely in
the axle carriers with no excess play.
Use the provided four-way suspension
multi-tool to tighten or loosen the
pivot ball cap.

Caster Adjustment

The E-Maxx offers the ability to adjust the caster angle of the front
suspension. Caster adjustment may be used to influence the understeer/
oversteer handling characteristics of the E-Maxx. Increasing the caster
angle will increase the tendency of the truck to oversteer (less traction
on the rear tires, more traction on the front tires), while decreasing the
caster angle will cause the truck to have a tendency to understeer (push
in the turns). This effect becomes more pronounced at higher steering
angles and higher spring rates. Caster is adjusted by repositioning the
shims on the pivot point of the upper suspension arms.

Caster adjustment shims (2 Front)

Vertical

Ground plane

4

Caster adjustment shims (1 Front, 1 Rear)

Vertical

Ground plane

7

The stock caster setting is 7-degrees with one shim at each end of the
arm. Reduce the caster angle to 4-degrees by removing the rear shim
and inserting it next to the front shim. The caster angle can be increased
to 10-degrees by removing the front shim and inserting it next to the
rear shim.

Fine Tuning the Shocks

The eight shocks (oil dampers) on your E-Maxx have tremendous
influence on its handling. Whenever you rebuild your shocks, or make
any changes to the pistons, springs or oil, always do it carefully and in
sets (front or rear). Piston head selection depends on the range of oil
viscosities that you have available. For example, using a two-hole piston
with lightweight oil will give you the same damping as a three-hole
piston with heavier oil.

Caster adjustment shims (2 Rear)

10

Ground plane

Vertical

We recommend using two-hole pistons with
a range of oil viscosities from 30W to 50W
(available from your hobby shop). The thinner
viscosity oils (30W or less) flow with less
resistance and provide less damping, while
thicker oils provide more damping. Use only
100% pure silicone shock oil to prolong seal life.
From the factory, the E-Maxx uses 30W oil.

The ride height for the E-Maxx can be adjusted
by adding or removing the clip-on spring pre-
load spacers. Note that changes in ride height
will occur when changes in shock angle or spring
rates are made. You can compensate for ride
height changes by changing the pre-load spacers
on the shocks

Shock Mounting Positions

Big bumps and rough terrain require a softer suspension with the
maximum possible suspension travel and ride height. Racing on a
prepared track or on-road use requires a lower ride height and firmer,
more progressive suspension settings. The more progressive suspension
settings help reduce body roll (increased roll stiffness), dive during
braking, and squat during acceleration.

Upper shock mounting position
(A) should generally be used
with lower shock mounting
positions 1 and 2. Upper shock
mounting position (B) should
be generally be used with lower
shock mounting positions 3 and

4. The innermost upper shock
mounting position (0) can be
used for tuning with the inner
pair of lower shock mounting
positions on the arm (1,2). It
is not compatible with lower
shock mounting positions 3 and

4. Other combinations may be
used to achieve individualized
suspension settings.

0

Wheel Force vs. Wheel Travel

TUNING ADJUSTMENTS

Lower Shock Mounting Positions

In the out-of-the-box configuration, the shocks are installed in
position (A) on the shock tower and position (2) on the lower
suspension arm. This setting allows for firm suspension and low
ride height, increasing the spring force (at the wheel). This setting
improves high-speed cornering on smoother terrain by lowering the
center of gravity. Body roll, brake dive, and squat are also reduced.

The inner pair of holes on the lower suspension arm should
be used to increase the ride height of the E-Maxx. The more vertical
position of the

shocks will allow for lower shock progression and the

soft, plush feel that’s characteristic of a Traxxas Maxx Truck.

Spring rate (at the wheel) increases as the lower shock mounting
position is moved from position (1) to position (4). This is equivalent
to using stiffer springs. Use higher spring rate settings for flatter
terrain with smaller and fewer bumps, and lower spring rate settings
for bigger bumps.

Ride height decreases as the lower shock mounting position is
moved from position (1) to position (4). Each pair of lower shock

2.5

2

1.5

Lower Mount 1, Upper Mount 0
Lower Mount 2, Upper Mount 0
Lower Mount 1, Upper Mount A
Lower Mount 2, Upper Mount A
Lower Mount 3, Upper Mount A
Lower Mount 4, Upper Mount A
Lower Mount 1, Upper Mount B
Lower Mount 2, Upper Mount B
Lower Mount 3, Upper Mount B
Lower Mount 4, Upper Mount B

mounting holes (1,2 and 3,4) has equal ride height. Use lower ride
height for high-speed cornering and flat terrain, and when racing on
relatively smooth tracks. Increase the ride height for rougher terrain
and tracks.

Upper Shock Mounting Positions

The upper shock mounting positions will have suspension effects
opposite from the lower shock mounting positions.

Spring rate (at the wheel), increases as the upper shock mounting
position is moved from position (A) to position (B).

Ride height is not affected by changes in the upper shock mounting
position.

Use the chart below to see the effect of the various shock mounting
positions. The horizontal length of the lines indicates the amount of
suspension travel. The angle or slope of the lines indicates the spring
rate (at the wheel).

Lower Mount 4

Lower Mount 3

More Firm

Lower Mount 2

Lower Mount 1

1

Wheel Force (lb)

Less Firm

0.5

0

0102030406070809010

50

Wheel Travel (mm)

E-MAXX BRUSHLESS • 21

TUNING ADJUSTMENTS

To achieve a good starting
point for the slipper clutch,
tighten the slipper clutch
adjusting nut clockwise until
the slipper clutch adjusting
spring fully collapses (do not
over tighten), and then turn
the slipper clutch nut counter­clockwise ¼ to ½ turn.

All of the toe links are installed
on the truck so that the left
hand thread indicators point
to the same direction. This
makes it easier to remember
which way to turn the wrench
to increase or decrease toe link
length (the direction is same
at all four corners). Note that
the groove in the hex indicates
the side of the toe link with the
left-hand threads.

Front of Truck

Left Hand Thread

Indicator

Left Side

Front of Truck

Left Hand Thread

Indicator

Right Side

22 • E-MAXX BRUSHLESS

ALIGNMENT SETTINGS

Adjusting the Toe-in

Your E-Maxx comes from the factory
with zero degrees of toe-in in the front,
and one degree of toe-in in the rear. You
can adjust the toe-in on the front and
rear of the truck. Turn off TSM (see page

14); then, set the steering trim on your
transmitter to neutral. Next, adjust your
steering turnbuckles so that both front
wheels are pointing straight ahead and
are parallel to each other (0 degrees toe-
in). This will ensure the same amount of
steering in both directions. Adjust the
rear toe control links so that the rear
wheels have 1˚ of toe-in.

Static Camber Adjustment

The wheels can be set to have either
positive or negative camber (see illustration
below). The camber angle changes as the
wheel moves up and down through its range
of travel. Static camber is the camber angle at
the wheel when the vehicle is set at its normal,
stationary ride height.

The suspension pivot balls located in the axle
carriers adjust the static camber. The pivot
balls are protected by blue dust plugs. To
adjust your static camber, insert the supplied 2.5mm hex wrench
through the slit in the dust plug and engage the end of the pivot ball
(compressing the suspension until the arms are parallel to the ground
will allow for easier hex wrench engagement). The upper pivot ball
is normally screwed all the way in. Negative camber is achieved by
screwing the pivot ball of the lower control arm out. Note: When
camber is changed, the toe angle of the wheel has to be reset.

Positive Camber Negative Camber

Right Hand
(Normal) Threads

Left Hand
Threads

Decrease

Length

Increase

Length

Static Camber Base
Factory Settings

Front: 1-degree negative

camber each

side
Rear: 1-degree negative
camber each side

TRANSMISSION TUNING

Adjusting the Slipper Clutch

The E-Maxx is equipped with an
adjustable Torque Control slipper
clutch which is built into the large spur
gear. The purpose of the slipper clutch is
to regulate the amount of power sent to
the rear wheels to prevent tire spin. When
it slips, the slipper clutch makes a high-pitch,
whining noise.

To adjust the slipper clutch, remove the rubber
slipper clutch plug

on the transmission cover.
The slipper clutch is integrated into the main spur gear on the
transmission. The slipper clutch is adjusted using the spring-loaded
locknut on the slipper shaft. Use the supplied universal wrench.
To tighten or loosen the slipper nut, insert the 2.0mm hex wrench
into the hole in the end of the slipper shaft. This locks the shaft for
adjustments. Turn the adjustment nut clockwise to tighten (less
slippage) and counter-clockwise to loosen (more slippage).

Tighten

Loosen

WHEELS AND TIRES

Many types of aftermarket tires and wheels can be adapted for
use on your model. Most will affect the overall width and the
suspension geometry of the model. The offsets and dimensions
designed into the model’s wheels are intentional; therefore,
Traxxas cannot recommend the use of other non-Traxxas wheels
with different specifications. The diameter of the wheels is an
innovative design, and there is a variety of different tires available
for you to experiment with in addition to the included tires on the
model (listed in your parts list). Experimentation with different
types of tires is recommended to see which ones work the best on
the terrain where the model is run. When selecting tires, consider
the overall diameter and the rubber compound (hard or soft). If
the overall diameter of the tire is significantly increased, you will
need to use a smaller pinion gear to compensate for the larger tire.
Soft compound tires with many short spikes generally work better
on hard, dry surfaces. In loose dirt, a tire with large spikes should
perform better. See your parts list for accessory wheels and tires.

TUNING ADJUSTMENTS

For Expert Drivers

For Expert Drivers

MOTOR AND GEARING

The E-Maxx is equipped from the factory with a 68-tooth spur gear
and 17-tooth pinion gears. E-Maxx has a large range of gearing
making it suitable for many different types of applications and
environments. If you want more acceleration and less top speed,
use a smaller pinion gear (fewer teeth, higher numerical ratio). The
overall reduction is the number of turns the motor makes for one
revolution of the tire. Higher numerical ratios provide more torque,
lower numerical ratios provide more top speed. Use the following
formula to calculate the overall ratio for combinations not listed on
the gear chart:

# Spur Gear Teeth

# Pinion Gear Teeth

Caution! Operating your model with 65+mph gearing

• The 28/65 ratio for use with 6S LiPo batteries is designed
for maximum speed on smooth surfaces only, with steady
acceleration to full throttle and optional Talon tires installed.

• Do not use this gear ratio for general driving.

• Avoid repetitive starting and stopping.

• Do not use the 28/65 ratio with NiMH batteries or low-capacity
LiPo batteries. 5000mAh LiPo batteries are recommended.

• Allow the motor to cool between runs, and monitor motor
temperature.

• Do not use the 28/65 gear ratio for off­road running or overheating and damage
may result.

• Do not allow the motor temperature
to exceed 200° F or damage and motor
failure may result. To accurately monitor
motor temperature and prevent
overheating, a telemetry temperature
sensor (part #6523, sold separately) can
be installed on the motor to continually
monitor temperature as your drive.

x 5.22 = Final Gear Ratio

*with included optional gearing
**28T pinion and 65T spur not included.

Speed 35+ mph 40+ mph* 50+ mph

Pinion/Spur 17/68 20/68 17/68 28/65**

Battery

Nominal Voltage 16.8V 14.8V 22.2V 22.2V

mAh 4000+ mAh 5000+ mAh 5000+ mAh 5000+ mAh

Skill Level

For high-speed running on smooth surfaces with optional Talon tires only.

Adjusting Gear Mesh

Incorrect gear mesh is the most
common cause of stripped spur
gears. Gear mesh should be
checked and adjusted anytime
a gear is replaced. Access the
gears by removing the single
screw on the top gear cover.

To set the gear mesh, cut a
narrow strip of notebook paper
and run it into the gear mesh.
Loosen the motor screws and
slide a motor and pinion gear
into the spur gear. Retighten the
motor screws and then remove
the strip of paper. Repeat with
the other motor. You should
be able to run a fresh strip of
paper through the gears without
binding them.

Model #39086-4

Twin 7-Cell NiMH

(14 cell total)

Twin 2S LiPo

(4S total)

Motor
Screw

Strip of

Paper

Your Battery Selection and Pinion Gear
Selection Determines Your Speed.

How Fast Do You Want To Go?

65 mph

& Beyond

Twin 3S LiPo

(6S total)

Twin 3S LiPo

(6S total)

Gearing Compatibility Chart:

The chart below shows a full range
of gear combinations. This does NOT
imply that these gear combinations
should be used. Over-gearing
(bigger pinions, smaller spurs) can
overheat and damage the motor
and/or speed control.

Spur Gear

65 68

DNF

DNF

DNF

DNF

4.53

4.25

4.00

3.78

15

16

17

18

19 3.42 3.58

20 3.25

Pinion Gear

3.40

21 3.10 3.24

NR

22

23

24

B

Stock gearing

B

Optional included gearing (4S LiPo)

Recommended gearing
for all battery types

Recommended gearing
for 4S LiPo only

Not recommended

Does not fit

3.09

NR DNF

NR DNF

E-MAXX BRUSHLESS • 23

TUNING ADJUSTMENTS

DUAL STEERING SYSTEM

Your new E-Maxx uses dual-servo steering and a single heavy-duty
servo saver for powerful, responsive steering. To prevent damage
to the steering servos, it is important to make sure that the servos
are “at rest” when the steering is at neutral. If one servo is out of
adjustment, then both servos will work against each other, fighting
to find center.

Center

Drag Link

Servo Horn

Toe Link

Bellcrank

Adjusting the Steering System

1. Disconnect the short

Toe Link

steering link that connects
the servo saver to the servo horn.

2. Remove the drag link that connects the two servo horns.

3. Remove the servo horns.

4. Connect a pair of charged batteries to the ESC. Turn on the
transmitter, then the ESC. Note: It is recommended to unplug
the motor or remove the pinion gears during steering setup.

5. Turn off TSM (see page 14).

6. Adjust the steering trim on the transmitter to the
neutral “0” position.

7. Install both servo horns. Make sure they are parallel to the
center line of the chassis (pointing to the rear of the truck).

Servo Horn

Servo Saver

8. Connect the short steering link from the servo saver to the
servo horn. Make sure the servo saver is parallel to the center
line of the chassis (also parallel to the servo horns). If not,
make small adjustments to the length of the link so the
everything is parallel.

9. The steering should operation correctly with equal travel left
and right. Now connect the second servo.

10. Confirm the length of the center drag link (89.5mm - see
template, below).

11. Connect the center drag link to one of the steering servos.
Check for alignment with the holes in the second steering link.
If these do not line up, make small adjustments to the length of
the link until the holes line up.

12. Connect the center drag link to the second steering
servo horn.

13. If necessary, fine tune the length of the center link to eliminate
any load on the steering system in the neutral position.

If you are using aftermarket servos, it is important to use servo
horns designed for E-Maxx. Optional steering servo horns are sold
separately for use with non-Traxxas servos.

24 • E-MAXX BRUSHLESS

Center Drag Link

89.5mm

MAINTAINING YOUR MODEL

Your model requires timely maintenance in order to stay in top
running condition. The following procedures should be taken

very seriously.

Inspect the vehicle for obvious damage or wear. Look for:

1. Cracked, bent, or damaged parts

2. Check the wheels and steering for binding.

3. Check the operation of the shock absorbers.

4. Check the wiring for any frayed wires or loose connections.

5. Check the mounting of the receiver and servo(s) and
speed control.

6. Check the tightness of the wheel nuts with a wrench.

7. Check the operation of the radio system, especially the
condition of the batteries.

8. Check for any loose screws in the chassis structure
or suspension.

9. Inspect the gears for wear, broken teeth, or debris lodged
between the teeth.

10. Check the tightness of the slipper clutch.

11. Check the tightness of the front pivot balls.

Other periodic maintenance:

• Slipper clutch pads (friction material):

Under normal use, the
friction material in the
slipper clutch should
wear very slowly. If the
thickness of any one
of the slipper clutch
pads is 1.8mm or less, the
friction disc should be replaced.
Measure the pad thickness using
calipers or measuring against the diameter
of the 1.5 and 2.0mm hex wrenches provided
with the model.

• Chassis: Keep the chassis clean of accumulated dirt and grime.

Periodically inspect the chassis for damage.

• Motor: Every 10-15 runs, remove, clean, and lubricate the motor.
Use a product such as electric motor cleaning spray to flush dirt
out of the motor. After cleaning, lubricate the bushings at each
end of the motor with a drop of light-weight electric motor oil.

• Shocks: Keep the oil level in the shocks full. Use only 100%
pure silicone shock oil to prolong the life of the seals. If you are
experiencing leakage around the top of the shock, inspect the
bladder in the top cap for signs of damage or distortion from
overtightening. If the bottom of the shock is leaking, then it
is time for a rebuild. The Traxxas rebuild kit for two shocks is
part #2362.

• Suspension: Periodically inspect the model for signs of damage
such as bent or dirty suspension pins, bent turnbuckles, loose
screws, and any signs of stress or bending. Replace components
as needed.

• Driveline: Inspect the driveline for signs of wear such as worn
drive yokes, dirty axle half shafts, and any unusual noise or
binding. Remove the gear cover and Inspect the spur gear for
wear and check the tightness of set screws in the pinion gears.
Tighten, clean, or replace components as needed.

Storage

When you are through running the model for the day, blow it off
with compressed air or use a soft bristled paint brush to dust-off
the vehicle. Always disconnect and remove the batteries from the
model whenever the model is stored. If the model will be stored for
a long time, then also remove the batteries from the transmitter.

If you have questions or need technical assistance, call Traxxas at

1-888-TRAXXAS

(1-888-872-9927) (U.S. residents only)

Always wear eye protection
when using compressed
air or spray cleaners and
lubricants.

10

E-MAXX BRUSHLESS • 25

TQi ADVANCED TUNING GUIDE

Starting Over:

Restoring Factory Defaults

When programming your TQi
transmitter, you may feel the
need to start over with a clean
slate. Follow these simple steps
to restore the factory settings:

1. Turn transmitter off.

2. Hold both MENU and SET.

3. Turn transmitter on.

4. Release MENU and SET. The
transmitter LED will blink red.

5. Press MENU once. The
transmitter LED will blink red
twice repeatedly.

6. Press SET to clear settings.
The LED will turn solid
green and the transmitter is
restored to default.

Throttle Trim Seek Mode

When the Multi-Function knob is
set to throttle trim, the transmitter
remembers the throttle trim
setting. If the throttle trim knob is
moved from the original setting
while the transmitter is off, or while
the transmitter was used to control
another model, the transmitter
ignores the actual position of
the trim knob. This prevents the
model from accidentally running
away. The LED on the face of the
transmitter will rapidly blink green
and the throttle trim knob (Multi­Function knob) will not adjust the
trim until it is moved back to its
original position saved in memory.
To restore throttle trim control,
simply turn the multi-function
knob either direction until the LED
stops blinking.

26 • E-MAXX BRUSHLESS

Your Traxxas transmitter has a programmable

Multi-Function knob
that can be set to control various advanced transmitter functions (set to
Traxxas Stability Management (TSM) by default, see page 14). Accessing
the programming menu is done by using the menu and set buttons on
the transmitter and observing signals from the LED. An explanation of
the menu structure follows on page 29. Experiment with the settings and
features to see if they can improve your driving experience.

Steering Sensitivity (Exponential)

The Multi-Function knob on the TQi transmitter can be set to control
Steering Sensitivity (also known as exponential). The standard setting
for Steering Sensitivity is “normal (zero exponential),” with the dial full
left in its range of travel. This setting provides linear servo response: the
steering servo’s movement will correspond exactly with the input from
the transmitter’s steering wheel. Turning the knob clockwise from center
will result in “negative exponential” and decrease steering sensitivity by
making the servo less responsive near neutral, with increasing sensitivity as
the servo nears the limits of its travel range. The farther you turn the knob,
the more pronounced the change in steering servo movement will be.
The term “exponential” comes from this effect; the servo’s travel changes
exponentially relative to the input from the steering wheel. The exponential
effect is indicated as a percentage—the greater the percentage, the greater
the effect. The illustrations below show how this works.

Normal Steering Sensitivity (0%
exponential):

In this illustration, the steering
servo’s travel (and with it, the
steering motion of the model’s
front wheels) corresponds
precisely with the steering wheel.
The ranges are exaggerated for
illustrative purposes.

Decreased Steering Sensitivity
(Negative Exponential):

By turning the Multi-Function
knob clockwise, the steering
sensitivity of the model will be
decreased. Note that a relatively
large amount of steering wheel
travel results in a smaller amount
of servo travel. The farther
you turn the knob, the more
pronounced the effect becomes. Decreased steering
sensitivity may be helpful when driving on low-traction
surfaces, when driving at high speed, or on tracks that favor sweeping turns where
gentle steering inputs are required. The ranges are exaggerated for illustrative
purposes.

Turning Range

at Transmitter

Effective Turning

Model

Range on

Throttle Sensitivity (Throttle Exponential)

The Multi-Function knob can be set to control Throttle Sensitivity.
Throttle Sensitivity works the same way as Steering Sensitivity, but
applies the effect to the throttle channel. Only forward throttle is
affected; brake/reverse travel remains linear regardless of the Throttle
Sensitivity setting.

Steering Percentage (Dual-Rate)

The Multi-Function knob can be set to control the amount (percentage)
of servo travel applied to steering. Turning the Multi-Function knob
fully clockwise will deliver maximum steering throw; turning the
knob counterclockwise reduces steering throw (note: turning the dial
counterclockwise to its stop will eliminate all servo travel). Be aware
that the steering End Point settings define the servo’s maximum
steering throw. If you set Steering Percentage to 100% (by turning the
Multi-Function knob fully clockwise), the servo will travel all the way to
its selected end point, but not past it. Many racers set Dual-Rate so they
have only as much steering throw as they need for the track’s tightest
turn, thus making the model easier to drive throughout the rest of the
course. Reducing steering throw can also be useful in making a model
easier to control on high-traction surfaces, and limiting steering output
for oval racing where large amounts of steering travel are not required.

Braking Percentage

The Multi-Function knob may also be set to control the amount of brake
travel applied by the servo in a nitro-powered model. Electric models do
not have a servo-operated brake, but the Braking Percentage function
still operates the same way in electric models. Turning the Multi-Function
knob full clockwise will deliver maximum brake throw; turning the
knob counterclockwise reduces brake throw (Note: Turning the dial
counterclockwise to its stop will eliminate all brake action).

Throttle Trim

Setting the Multi-Function knob to serve as throttle trim will allow you
to adjust the throttle’s neutral position to prevent unwanted brake drag
or throttle application when the transmitter trigger is at neutral. Note:
Your transmitter is equipped with a Throttle Trim Seek mode to prevent
accidental runaways. See the sidebar for more information.

TQi ADVANCED TUNING GUIDE

Steering and Throttle End Points

The TQi transmitter allows you to choose the limit of the servo’s travel
range (or its “end point”) independently for left and right travel (on the
steering channel) and throttle/brake travel (on the throttle channel).
This allows you to fine-tune the servo settings to prevent binding
caused by the servo moving steering or throttle linkages (in the case
of a nitro model) farther than their mechanical limits. The end point
adjustment settings you select will represent what you wish to be the
servo’s maximum travel; the Steering Percentage or Braking Percentage
functions will not override the End Point settings.

Steering and Throttle Sub-Trim

The Sub-Trim function is used to precisely set the neutral point of the
steering or throttle servo in the event that simply setting the trim knob
to “zero” does not completely center the servo. When selected, Sub-Trim
allows finer adjustment to the servo output shaft’s position for precise

Setting Lock

Once you’ve adjusted all of these settings the way you like them, you
may want to disable the Multi-Function knob so none of your settings
can be changed. This is especially handy if you operate multiple
vehicles with a single transmitter via Traxxas Link

Multiple Settings and the Multi-Function Knob

It is important to note that settings made with the Multi-Function
knob are “overlaid” on top of each other. For example, if you assign the
Multi-Function to adjust Steering Percentage and set it for 50%, then
reassign the knob to control Steering Sensitivity, the transmitter will
“remember” the Steering Percentage setting. Adjustments you make
to Steering Sensitivity will be applied to the 50% steering throw setting
you selected previously. Likewise, setting the Multi-Function knob to
“disabled” will prevent the knob from making further adjustments, but

the last setting of the Multi-Function knob will still apply.
setting of the neutral point. Always set the Steering Trim knob to zero
before making final adjustment (if required) using Sub-Trim. If Throttle
Trim has been previously adjusted, the Throttle Trim will need to be
reprogrammed to “zero” before making final adjustment using Sub-Trim.

TRANSMITTER LED CODES

LED Color / Pattern Name Notes

Solid green Normal Driving Mode See page 13 for information on how to use your transmitter controls.

Slow red (0.5 sec on / 0.5 sec off) Binding See page 14 for more information on binding.

Flashing fast green (0.1 sec on / 0.15 sec off) Throttle Trim Seek Mode

Flashing medium red (0.25 sec on / 0.25 sec off) Low Battery Alarm Put new batteries in the transmitter. See page 11 for more information.

Flashing fast red (0.125 sec on / 0.125 sec off) Link Failure / Error

Programming Patterns

or

Counts out number (green or red) then pauses Current menu position See Menu Tree for more information.

x

Fast green 8 times Menu setting accepted (on SET)

8

Fast red 8 times Menu SET invalid User error such as trying to delete a locked model.

x

8

RECEIVER LED CODES

LED Color / Pattern Name Notes

Solid green Normal Driving Mode See page 13 for information on how to use your transmitter controls.

Slow red (0.5 sec on / 0.5 sec off) Binding See page 14 for more information on binding.

Flashing fast red (0.125 sec on / 0.125 sec off) Failsafe / Low Voltage Detect

™

Model Memory.

Turn the Multi Function knob right or left until the LED stops flashing.
See sidebar for more information.

Transmitter and receiver are no longer bound. Turn the system off and then
back on to resume normal operation. Find source of the link failure (ie out of
range, low batteries, damaged antenna).

Consistent Low Voltage in the receiver triggers Failsafe so there is enough
power to center the throttle servo before it completely loses power.

Failsafe

Your Traxxas radio system is equipped
with a built-in failsafe function that
returns the throttle to its last saved
neutral position in the event of a signal
loss. The LED on the transmitter and the
receiver will rapidly flash red.

E-MAXX BRUSHLESS • 27

TQi ADVANCED TUNING GUIDE

TRAXXAS LINK MODEL MEMORY

Traxxas Link Model Memory is an exclusive, patent-pending feature
of the TQi transmitter. Each time the transmitter is bound to a new
receiver, it saves that receiver in its memory, along with all the settings
assigned to that receiver. When the transmitter and any bound receiver
are switched on, the transmitter automatically recalls the settings for
that receiver. There is no need to manually select your vehicle from a list
of model memory entries.

Model Lock

The Traxxas Link Model Memory feature can store up to thirty models
(receivers) in its memory. If you bind a thirty-first receiver, Traxxas Link
Model Memory will delete the “oldest” receiver from its memory (in
other words, the model you used the longest time ago will be deleted).
Activating Model Lock will lock the receiver in memory so it cannot be
deleted.

You may also bind multiple TQi transmitters to the same model, making
it possible to pick up any transmitter and any previously bound model
in your collection and simply turn them on and drive. With Traxxas
Link Model Memory, there is no need to remember which transmitter
goes with which model, and there is never a need to have to select any
model from a list of model memory entries. The transmitter and receiver
do it all for you automatically.

To activate Model Lock:

1. Switch on the transmitter and receiver you wish to lock.

2. Press and hold MENU. Release when the status LED blinks green.

3. Press MENU three times. The status LED will blink green four
times repeatedly.

4. Press SET. The status LED will blink green in single-flash intervals.

5. Press SET once. The status LED will blink red once repeatedly.

6. Press MENU once. The status LED will blink red twice repeatedly.

7. Press SET. The LED will blink rapidly green. The memory is now
locked. Press and hold MENU to return to driving mode.

Note: To unlock a memory, press SET twice at step 5. The LED will

blink rapidly green to indicate the model is unlocked. To unlock all
models, press MENU twice at step 6 and then press SET.

To delete a model:

At some point, you may wish to delete a model you no-longer drive
from the memory.

1. Switch on the transmitter and receiver you wish to delete.

2. Press and hold MENU. Release when the status LED blinks green.

3. Press MENU three times. The status LED will blink green four

times repeatedly.

4. Press SET once. The status LED will blink green once repeatedly.

5. Press MENU once. The status LED will blink green twice repeatedly.

6. Press SET. The memory is now selected to be deleted. Press SET to

delete the model. Press and hold MENU to return to driving mode.

28 • E-MAXX BRUSHLESS

TQi ADVANCED TUNING GUIDE

MENU TREE

The Menu Tree below shows how to navigate through
the TQi transmitter’s various settings and functions.
Press and hold MENU to enter the Menu Tree, and use
the following commands to navigate through the menu
and select options.

MENU: When you enter a menu, you always start at the

top. Press MENU to move down the Menu Tree.
When you reach the bottom of the tree, pressing
MENU again will return you to the top.

SET: Press SET to move across the Menu Tree and select

options. When an option is committed to the
transmitter’s memory, the status LED will rapidly
blink green.

BACK: Press both MENU and SET to go back one level in

the Menu Tree.

EXIT: Press and hold MENU to exit programming.

Your selected options will be saved.

ECHO: Press and hold SET to activate the “echo” function.

Echo will “play back” your current position on the
Menu Tree should you lose your place. For example:
If your current position is Steering Channel End
Points, holding SET will cause the LED to blink green
twice, green once, and then red three times. Echo
will not alter your adjustments or change your
position in the programming sequence.

Below is an example of how to access a function in the Menu
Tree. In the example, the user is setting the Multi-Function knob
to be a Steering % (Dual-Rate) control.

To set the Multi-Function knob to control STEERING % (DUAL-RATE):

1. Switch the transmitter on.

2. Press and hold MENU until the green LED lights. It will blink in single
intervals.

3. Press SET. The red LED will blink in single intervals to indicate Steering
Sensitivity (Expo) has been selected.

4. Press MENU twice. The red LED will blink three times repeatedly to
indicate Steering % (Dual-Rate) has been selected.

5. Press SET to select. The green LED will blink 8 times fast to indicate
successful selection.

6. Press and hold MENU to return to driving mode.

Restoring Factory Defaults:

Transmitter

OFF

*Torque Control is a feature designed only for use with the power system in the Traxxas Funny Car Race Replica (Model #6907).

Hold both

MENU and SET

Transmitter ONRelease MENU and SET

red LED blinks

Enter Programming

Press and hold
MENU for 3 seconds

Multi-Function Knob

1

One Blink Green

Press

MENU

Channel Setup

2

Two Blinks Green

Press

MENU

Mode Selection

3

Three Blinks Green

Press

MENU

Traxxas-Link

4

Four Blinks Green

Press SET to clear settings. LED will turn

solid green. Transmitter is restored to default

Press

SET

Press

SET

Press

SET

Press

SET

Press MENU to move through options.
Press SET to select an option.

Steering Sensitivity (Expo)

1

One Blink Red

Throttle Sensitivity (Expo)

2

Two Blinks Red

Steering % (Dual-Rate)

3

Three Blinks Red

Braking %

4

Four Blinks Red

Throttle Trim

5

Five Blinks Red

Knob Disabled

6

Six Blinks Red

Torque Control*

7

Seven Blinks Red

TSM

8

Eight Blinks Red

Steering (Channel 1)

1

One Blink Green

Press MENU

Throttle (Channel 2)

2

Two Blinks Green

Press SET to select an option.

Electric

1

One Blink Red

Press MENU

Nitro

2

Two Blinks Red

Model Locking

1

One Blink Green

Press

MENU

Delete Model

2

Two Blinks Green

Press

Press

SET

SET

Press

SET

Press

SET

Note: The transmitter is “live” during programming
so you can test the settings real time without having
to exit the Menu Tree.

Press MENU to move through options.
Press SET to select an option.

Servo Reversing

1

One Blink Red

Sub-Trim

2

Two Blinks Red

End Points

3

Three Blinks Red

Turn left to desired end point and press set to save.
To reset max throw: Let go of controls and press SET.

Reset End Points

4

Four Blinks Red

Servo Reversing

1

One Blink Red

Sub-Trim

2

Two Blinks Red

End Points

3

Three Blinks Red

forward to desired end point and press set to save.
To reset max throw: Let go of controls and press SET.

Reset End Points

4

Four Blinks Red

Unlock

1

One Blink Red

Lock

2

Two Blinks Red

Unlock All

3

Three Blinks Red

Confirm Deletion

1

One Blink Red

Press SET to reverse
servo direction.

Use knob to adjust
sub-trim. Press SET to save.

Use steering wheel to
adjust. Turn right to desired
end point, press set to save.

Press SET to restore factory
default end points.

Press SET to reverse
servo direction.

Use knob to adjust sub­trim. Press SET to save.

Use trigger to adjust. Pull
back to desired end point,
press set to save. Push

Press SET to restore factory
default end points.

TQi ADVANCED TUNING GUIDE

Set Multi-Function
knob for STEERING
SENSITIVITY (Expo)

Set Multi-Function
knob for THROTTLE
SENSITIVITY (Expo)

Set Multi-Function
knob for STEERING
DUAL RATE (%)

Set Multi-Function
knob for BRAKING
PERCENTAGE (%)

Set Multi-Function
knob for
THROTTLE TRIM

To LOCK the
Multi-Function knob

To REVERSE
the direction of
STEERING servo

To set the SUB TRIM
of the STEERING
servo

To set the END
POINTS of the
STEERING servo

To reset the END
POINTS of STEERING
servo to defaults

To REVERSE
the direction of
THROTTLE servo

To set the SUB TRIM
of the THROTTLE
servo

To set the END
POINTS of the
THROTTLE servo

To reset the END
POINTS of THROTTLE
servo to defaults

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press/hold MENU

green LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

x

Press MENU

green LED blinks (x2)

Press SET to confirm

green LED blinks (x8)

Press MENU to confirm

red LED blinks (x2)

Press MENU twice

red LED blinks (x3)

Press MENU 3 times

red LED blinks (x4)

Press MENU 4 times

red LED blinks (x5)

Press MENU 5 times

red LED blinks (x6)

2

green LED blinks

2

green LED blinks

2

green LED blinks

2

green LED blinks

2

green LED blinks

2

green LED blinks

2

green LED blinks

2

green LED blinks

Press SET

Press SET

Press SET

Press SET

Press SET

Press SET

Press SET

Press SET

x

8

returns to driving mode

x

2

x

3

x

4

x

5

x

6

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press MENU

Press MENU

Press MENU

Press MENU

x

x

x

x

x

x

x

x

x

Press/hold MENU

Press SET to select

green LED blinks (x8)

Press SET to select

green LED blinks (x8)

Press SET to select

green LED blinks (x8)

Press SET to select

green LED blinks (x8)

Press SET to lock

green LED blinks (x8)

green LED blinks (x2)

green LED blinks (x2)

green LED blinks (x2)

green LED blinks (x2)

8

Press/hold MENU

returns to driving mode

8

Press/hold MENU

returns to driving mode

8

Press/hold MENU

returns to driving mode

8

Press/hold MENU

returns to driving mode

8

Press/hold MENU

returns to driving mode

Press SET to reverse

red LED blinks (x2)

Press MENU twice

red LED blinks (x3)

Press MENU 3 times

red LED blinks (x4)

2

2

2

2

servo direction

Press MENU

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

Press SET

red LED blinks

x

8

x

2

x

3

x

4

Adjust the Multi-

Function knob until the

LED turns solid green.

Press/hold MENU

returns to driving mode

Use Multi-Function

knob to set neutral

Turn steering

wheel to desired max

left and right travel

x

Press SET

to reset end points

x

Press SET to reverse

servo direction

x

Press MENU

red LED blinks (x2)

x

Press MENU twice

red LED blinks (x3)

x

Press MENU 3 times

red LED blinks (x4)

to save each position

8

returns to driving mode

8

returns to driving mode

2

3

trigger to set desired
max throttle or brake

4

green LED blinks (x8)

MENU TREE FORMULAS

To select functions and make adjustments to the TQi transmitter without
referencing the menu tree, turn your transmitter on, find the function in the
left column you wish to adjust, and simply follow the corresponding steps

1

Always turn your

transmitter on first.

x

8

Press SET

to save position

x

Press SET

Press/hold MENU

Press/hold MENU

Use Multi-Function

knob to set neutral

Use throttle

x

Press SET

Press/hold MENU

returns to driving mode

8

Turn steering wheel

Use trigger to test

8

Press/hold MENU

returns to driving mode

to test settings

Press SET

to save position

Press SET to save

returns to driving mode

x

8

returns to driving mode

returns to driving mode

IF END POINTS

ARE OK:

Press/hold MENU

Press/hold MENU

IF END POINTS

ARE OK:

Press/hold MENU

IF END POINTS

NEED TO BE

CHANGED:

Press SET

and repeat steps 6-8

IF END POINTS

NEED TO BE
CHANGED:

Press SET

and repeat steps 7-9

.

TQi ADVANCED TUNING GUIDE

PROGRAMMING YOUR TQi TRANSMITTER WITH
YOUR APPLE iPHONE, iPAD, iPOD TOUCH, OR

ANDROID MOBILE DEVICE

The Traxxas Link™ Wireless Module
(part #6511, sold separately) for the TQi
transmitter installs in minutes to transform
your Apple® iPhone®, iPad®, iPod touch®,
or Android™ device into a powerful
tuning tool that allows you to replace the
transmitter’s button/LED programming
system with an intuitive, high-definition,
full-color graphical user interface.

Traxxas Link

The powerful Traxxas Link app (available in the Apple App Store℠
Google Play™) gives you complete control over the operation and tuning
of your Traxxas model with stunning visuals and absolute precision. Install
Traxxas Link telemetry sensors on the model, and Traxxas Link displays
real-time data such as speed, RPM, temperature, and battery voltage.

Compatible with:
iPod touch (5th generation and later)
iPad (3rd generation and later)
iPad mini
Android 4.4 (and later)

iPhone 4S
iPhone 5
iPhone 5C
iPhone 5S

or on

Apple, the Apple logo, iPhone, iPad, and iPod touch are trademarks of Apple Inc., registered in the U.S. and other countries.
App Store is a service mark of Apple Inc. Android and Google Play are trademarks of Google Inc.

Intuitive iPhone, iPad, iPod
touch, and Android interface

Traxxas Link makes it easy to
learn, understand, and access
powerful tuning options. Control
Drive Effects settings such as
TSM assistance percentage;
steering and throttle sensitivity;
steering percentage; braking
strength; and throttle trim by
simply touching and dragging the

Tap and slide to adjust TSM, Steering Sensitivity,

Throttle Trim, Braking Percent, and more!

sliders on the screen.

Real-Time Telemetry

When you equip your model
with sensors, the Traxxas Link
dashboard comes to life showing
you speed, battery voltage, RPM,
and temperature. Set threshold
warnings and log maximums,
minimums, or averages. Use the
recording function to document
your dashboard view, with
sound, so that you can keep
your eyes on your driving and

The customizable Traxxas Link dashboard delivers

real-time rpm, speed, temperature, and voltage data.

not miss a single apex.

Manage up to 30 Models with Traxxas Link

The TQi radio system
automatically keeps track of
what vehicles it has bound to
and what settings were used
for each--up to 30 models total!
Traxxas Link provides a visual
interface to name the models,
customize their settings, attach
profiles, and lock them into
memory. Simply choose a model
and any previously bound

Traxxas Link Model Memory simplifies organizing

transmitter, power them up,
and start having fun.

The Traxxas Link
Wireless Module is sold
separately (part #6511).
The Traxxas Link
application is available
from the Apple App store
for iPhone, iPad, or iPod
touch and on Google
Play for Android devices.
iPhone, iPad, iPod touch, or
the Android device are not
included with the Traxxas
Link Wireless Module.

For more information
about the Traxxas Link
Wireless Module and the
Traxxas Link application,
visit Traxxas.com.

your collection of vehicles.

TRAXXAS • 31

6250 Traxxas Way, McKinney, TX 75070

1-888-TRAXXAS

1600502 39086-4-OM-EN-R01

owner’s manual