Traxxas Traxx, TRX-4 (4) (complete set, front & rear) User guide

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TRX-4 Traxx™ All-Terrain Track Set Installation Instructions

Kit Contents:

• TRX-4 Traxx (2 front, 2 rear)

• 2.5x12mm cap-head screws (8)

• 17mm wheel wrench

Recommended for optimal performance (sold separately):

Part No. Description

2250

2255

8247X Servo horn, steering, metal/ 3x14 BCS (1)
2262 BEC, complete (includes receiver box cover and seals)

transmissions, drive with the transmission in low
gear to prevent overheating and permanent motor
damage. On models equipped with single-speed
transmissions, the stock gearing (17-T pinion and
39-T spur gear) is suitable for general use in most
terrain with NiMH or 2s LiPo batteries; for mud or
snow use, or when using a 3s LiPo battery, you must
replace the stock gearing with an 11-T pinion and
45-T spur gear prior to driving.

Servo, digital high-torque 330 coreless, metal gear (ball
bearing), waterproof

Servo, digital high-torque 400 brushless, metal gear (ball
bearing), waterproof

CAUTION: USE LOW GEAR

On models equipped with two-speed

2 3

Note: Traxx drive units
are included for each
corner of the truck and
are marked for correct
installation: front left,
front right, rear left, rear
right. The drive units
must be installed in the
correct locations for
proper operation.

Front Left Rear LeftRear RightFront Right

4 5

2.5x10mm
CS

2.5x10mm
CS

Covers Part #8880

Note: The vehicle body, front/rear bumpers,
or the rock sliders may require minor trimming
for proper clearance after installation of the
Traxx drive units. A travel limiter has been pre­installed in the rear shocks on the drive units
to minimize the amount of trimming needed
on the body. For more track articulation on
uneven terrain, remove the travel limiter;
additional body trimming may be required.
Install the TRX-4 Long Arm Lift Kit (part #8140,
8140R, or 8140X, sold separately) for additional
height and clearance with the body.

1

Remove the
M4x0.7mm
wheel nuts from
the stub axles
and remove all
four wheels and
tires. Retain and
reuse the wheel nuts.

6

2.5x12mm
CS

2.5x12mm
CS

M4x0.7mm

NL

Secure the brackets with the included 2.5x12mm cap-head
screws (2).

Remove the stub axle nuts from
the Traxx drive units using the
included 17mm wheel wrench.

Install the drive units on the stub axles and reinstall
the wheel nuts; tighten securely. Reinstall the stub

Remove the 2.5x10mm cap-head screws from the
portal gearboxes.

axle nuts.

Driving Tips

• Keep the drive teeth on the interior of each rubber track clear of debris to prevent the track from shifting out
of position or derailing during operation.

• Occasionally, the drive wheel may skip on the drive teeth of the track. This is normal and will not cause
damage to your truck. Check for any obstructions and/or reposition the truck before continuing.

• Observe the rollover height when driving over tall obstacles. Do not attempt to climb obstacles that are taller
than the rollover height of the Traxx (Fig. A). Be careful when reversing. The trailing wheel has a much lower
rollover height than the leading wheels; some obstacles will be too tall for the trailing wheel.

• Increased traction from the rubber tracks may cause your truck body to lean to one side while driving
through deep snow or thick mud. This is called torque twist. Installing stiffer suspension springs can reduce
torque twist in the chassis and provide additional stability.

Maintenance

• Always clean debris from the Traxx drive units after running, including snow buildup, mud, etc. Spray all metal
components, screws, bearings, and bushings with WD-40® or similar water displacing light oil. It is best to
remove the rubber tracks to gain access to all areas and to allow for complete cleaning of the assemblies.

• Clean the drive units using a garden hose with a spray nozzle. If a garden hose is not accessible, running the
Traxx in clear water, such as a stream or shallow pond, will remove much of the accumulated mud. Blow all
remaining water from the track assemblies with compressed air.

• DO NOT allow mud to dry on the drive units, as this will cause the assemblies to seize up and require full
disassembly and thorough cleaning.

• Refill the anti-rotation shocks (oil dampers) with 40wt silicone shock oil as necessary.

TRAXXAS.com

Traxxas, 6250 Traxxas Way, McKinney, TX 75070,

Phone: [phone], Fax: [phone], e-mail: [e-mail]

A

Forward

rollover height

Install the anti-rotation brackets on the portal gearboxes.
Position the brackets on the gearboxes until the tabs on the
bracket snap into place.

Drive wheel

Keep the drive teeth free
of debris while running

Reverse

rollover height

KC2706-R04 190528

TRX Tracks (Model 8880) Parts List

Parts shown in bold are optional accessories. Part categories and individual part listings are arranged alphabetically.

Axle Components

8887 Stub axle (1)
8886 Stub axle nut (4)

Bearings & Bushings

5107A Ball bearing, black rubber sealed (17x26x5mm) (2)
5196A Ball bearing, black rubber sealed (20x32x7mm) (2)
8889 Bearing retainers, inner (2), outer (2)
1675 Bushings, self-lubricating (5x11x4mm) (14)

Hardware

5150 E-clips, 1.5mm (24)
1985 PTFE-coated washers, 5x8x0.5mm (20) (use with ball bearings)
3236 Screws, 2.5x12mm cap-head machine (6)
2620 Screws, 2.5x23mm cap-head machine (6)
3215 Screws, 2.5x6mm cap-head machine (hex drive) (6)
3965 Screws, 2.5x8mm cap-head machine (6)
2576 Screws, 3x8mm button-head machine (hex drive) (6)
8886 Stub axle nut (4)
5480X Wheel wrench, splined, 17mm

Rubber Tracks

8895 Rubber track, All-Terrain, front (left or right) (rubber) (1)
8896 Rubber track, All-Terrain, rear (left or right) (rubber) (1)

Shocks (GTR)

7066X Body, GTR shock (hard-anodized, PTFE-coated aluminum) (1)

7066 Body, GTR shock (molded composite) (2)
7065 Caps and spring retainers, GTR shock (upper cap (2)/ hollow balls

(4)/ bottom cap (2)/ upper retainer (2)/ lower retainer (2))
7028 Hollow balls (20)
7067 Piston, damper (2x0.5mm hole, red) (4)/ travel limiters (4)
7062 Rebuild kit, GTR composite shocks (x-rings, bladders, pistons,

e-clips, shock rod ends, hollow balls) (renews 2 shocks)
7063 Shaft, GTR shock (2)

7063T Shaft, GTR shock (TiN-coated) (4)

8885 Shock mounts (frame, left (2), frame, right (2))/ portal mounts (1 each,

front (left & right), rear (left & right))
7061 Shocks, GTR composite (assembled, without springs) (2)

7061X Shocks, GTR hard anodized, PTFE-coated bodies with TiN shafts

(fully assembled, without springs) (4)
7145 Spring, shock (GTR) (1.76 rate, orange) (1 pair)

7146 Spring, shock (GTR) (1.92 rate, green) (1 pair)

7147 Spring, shock (GTR) (2.06 rate, tan) (1 pair)
7148 Spring, shock (GTR) (2.22 rate, black) (1 pair)

Tracks

8890 Drive wheel (1)
8895 Rubber track, All-Terrain, front (left or right) (rubber) (1)
8896 Rubber track, All-Terrain, rear (left or right) (rubber) (1)
8888 Spring (4)
8891 Tension wheels (6)/ road wheels (4)
8881 Traxx™, front, left (assembled) (requires #8887 stub axle, #7061

GTR shock, & #8895 rubber track)
8882 Traxx™, front, right (assembled) (requires #8887 stub axle, #7061

GTR shock, & #8895 rubber track)
8883 Traxx™, rear, left (assembled) (requires #8887 stub axle, #7061 GTR

shock, & #8896 rubber track)
8884 Traxx™, rear, right (assembled) (requires #8887 stub axle, #7061

GTR shock, & #8896 rubber track)

Wheels

8890 Drive wheel (1)
8891 Tension wheels (6)/ road wheels (4)

Parts List Exploded View

7061

7061X opt.

7065

7062
7067
7062

7063
7063T opt.

7067*

7066
7066X opt.

7065

7028
7065
7062

3236

2.5x12 CS

3236

2.5x12 CS

7061

7061X opt.

Shock Assembly

Track Tension Adjustment

Note: The track tension has been preset at the factory and should
not require adjustment. If more tension is desired, remove the tension
bar and adjust the tension.

1. Remove the 2.5x23mm cap screw from the track tension bar (T1).

2. Dislodge the tension bar and fold it onto the chassis; remove the
chassis from the track (T2).

3. Unscrew the tensioner (T3) to the desired track tension
(2.5mm is the factory setting) (T4).

4. Reinstall the components in reverse order.

CAUTION! Be cautious when adjusting tension; too much tension
will result in very high drivetrain loads, motor failure, and/or
premature wear on track components.

*Rear shock only

27.7mm 30.2mm

T1 T3 T4T2

7146

1985

2576
3x8 BCS

8891

7062

7062

7065

7028
7065
7062

Tension Bars

FRONT REAR

MEDIUM LONG

2.5x23mm CS

2576
3x8 BCS

1675
5x11x4 SLB

1985

1675
5x11x4 SLB

3236

2.5x12 CS

3236

2.5x12 CS

1675
5x11x4 SLB

1985

8891

1985

8885

2620

2.5x23 CS

1985

8895 (front, left or right)
8896 (rear, left or right)

3236

2.5x12 CS

1675

8891

5x11x4 SLB

1985

1675
5x11x4 SLB

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

1-888-TRAXXAS

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

1985

8890

1675
5x11x4 SLB

8891

1985

1675
5x11x4 SLB

1985

8891

2.5mm

2576

8887

3215

2.5x6 CS

8889

5196A

2576
3x8 BCS

1985

1675
5x11x4 SLB

20x32x7 BB

3965

2.5x8 CS

1985

8891

1675
5x11x4 SLB

1675
5x11x4 SLB

8891

1985

3215

2.5x6 CS

3236

2.5x12 CS

8885

3965

2.5x8 CS 3965

1985

2576
3x8 BCS

8891

2576
3x8 BCS

1985

2576
3x8 BCS

3x8 BCS

8888

1985

1675
5x11x4 SLB

3965

2.5x8 CS

2620

2.5x23 CS

1675

1985

5x11x4 SLB

1985

3965

2.5x8 CS

2.5x8 CS

3965

2.5x8 CS

8891

2576
3x8 BCS

3965

2.5x8 CS

5107A
17x26x5 BB

1985

2576
3x8 BCS

1675
5x11x4 SLB

1985

8891

8886

8889

3215

2.5x6 CS

3215

2.5x6 CS

8881 (left front assembled)
8883 (left rear assembled)
8882 (right front assembled)
8884 (right rear assembled)
Requires:
8886 stub axle
8895 rubber track
7061 GTR shock

1985

Traxxas, 6250 Traxxas Way, McKinney, TX 75070,

TRAXXAS.com

Phone: [phone], Fax: [phone], e-mail: [e-mail]

1675
5x11x4 SLB

2576
3x8 BCS