Aem 30-4855 User Manual

Instruction Manual

P/N 30-48XX Dyno-Shaft

,!

WARNING:
Dyno-Shaft On-Vehicle Dynamometer is a valuable diagnostic
tool which must only be used in a safe manner and in
compliance with all applicable laws, rules and regulations. All
users of this product agree that AEM shall not be responsible or
liable for any personal injury, property or any other type or kind
of damage(s) resulting, directly or indirectly, from non­compliance.

AEM Performance Electronics

th

2205 126

Phone: [phone] Fax: [phone]

Street Unit A, Hawthorne, CA. 90250

http://www.aemelectronics.com

Instruction Part Number: 10-4800 Rev D

© 2012 AEM Performance Electronics

KIT CONTENTS

1 x 35-4740 Dyno-Shaft Controller Assembly
1 x 35-46XX Yoke Assembly (Style and P/N depends on kit purchased)
1 x 35-4780 Dyno-Shaft/AEMnet “Y” Harness
1 x Instruction Manual
Transmission Adapters (quantity and version depends on kit purchased)

Dyno-Shaft Kit Contents

INSTALLATION TIPS

1. Read the entire manual and instructions before beginning the installation.

2. Disconnect the negative battery cable(s) before beginning any work.

3. Make sure all connectors are fully seated and inserted.

4. Make sure all cables are routed away from heat sources or sharp objects.

TABLE OF CONTENTS

• Dyno-Shaft Installation 3

• Connecting to the AQ-1 9

• Using the Dyno-Shaft 10

• Connecting to a Series 2 EMS 15

• Connecting to a 3

• CAN BUS Message Structure 17

• Specifications 18

• Recommended Parts 18

• Replacement Parts 18

• Warranty 19

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rd

party display or logger 16

DYNO-SHAFT DESCRIPTION

The AEM Dyno-Shaft is a device that measures actual driveshaft torque from yoke
mounted strain gauges. This is not an inaccurate accelerometer based software
application, the AEM Dyno-Shaft provides repeatable, accurate measurement of
driveline torque and horsepower.

It is unaffected by headwind, crosswinds, tailwinds, vehicle weight discrepancies, up­hills, down-hills, road surface changes, wheel spin or proximity to other vehicles
because the Dyno-Shaft actually measures driveline torque and RPM, it doesn’t attempt
to estimate it.

The AEM Dyno-Shaft is zero maintenance. Power is supplied to the rotating sensor unit
via an air-core transformer which is formed by the coil on the controller housing and a
matching coil on the sensor. The sensor sends data back to the controller via the same
mechanism. There are no batteries to die, no temperamental slip rings to wear out.

DYNO-SHAFT KIT DIFFERENCES

The Sportsman level kit is designed for applications where a cast iron style transmission
slip yoke is acceptable. The Pro kit is designed for the most demanding applications
and is based around a CNC machined, 4340 chrome-moly yoke.

DYNO-SHAFT INSTALLATION

Make sure that all the work described below is performed 100% per the manufacturer’s
service instructions. If you do not have the proper tools and knowledge to perform the
driveshaft work then take the driveshaft to a machine shop that can perform the work for
you. Absolutely do not attempt to do this work without the proper tools as driveshaft
imbalance or even complete driveline failure is a possibility.

Raise the vehicle per the manufacturer’s instructions. A vehicle hoist is probably best.
Make 100% sure that the vehicle is secure before beginning any work underneath it.

MOUNTING THE DYNO-SHAFT SENSOR

Before attempting to mount the Dyno-Shaft to your vehicle you need to check to make
sure there is proper clearance to fit the device.

Confirm that at least 1.5” of your existing slip yoke’s shaft remains available
outside of your transmission tail housing under all vehicle operating conditions.
If it doesn’t maintain at least this amount then do not attempt the installation.
Shortening the driveshaft or minimizing the driveshaft movement is required
before proceeding.

Confirm that there are no obstructions to mounting the controller behind the
transmission tail shaft housing (see picture).

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Dyno-Shaft Clearance Requirements

Once you are confident the Dyno-Shaft will fit on your vehicle you can proceed to
remove the driveshaft from the vehicle.

Remove the transmission slip yoke from the driveshaft. This may be a good time to
replace the u-joint with a new unit as they are a high wear item and are inexpensive. In
some cases a conversion u-joint may be necessary to connect the Dyno-Shaft supplied
slip yoke to the driveshaft. Compare which series u-joint your Dyno-Shaft kit is designed
for against your existing u-joint to make sure you purchase the correct u-joint. The
Dyno-Shaft application guide (http://www.aemelectronics.com/images/Dyno­Shaft_Application_Guide.pdf) lists the various Dyno-Shaft kits and their associated u­joint series.

Replace the slip yoke on the driveshaft with the supplied Dyno-Shaft yoke.

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Dyno-Shaft sensor mounted on a Pro level Yoke

Re-balance the driveshaft if very high driveshaft RPM (7,000+) is expected.

MOUNTING THE DYNO-SHAFT CONTROLLER

Dyno-Shaft Controller

Measure the OD of the transmission tail shaft housing and select the proper adapter. All
of the adapters are identical except for the inner diameter. Select an adapter that fits
over the tail shaft housing without having to be distorted or opened up any.

Place the adapter inside the clamp area of the Dyno-Shaft controller and install on the
tail shaft housing. The locating ribs on the adapters are designed to fit into the cavity
between the clamp arms and controller body. Do not attempt to pry the Dyno-Shaft
clamp area open to make things fit, select a larger ID adapter instead.

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In some cases (notably some T400 and T56 Magnum tail shaft housing castings) the
OD of the housing is just slightly smaller than the ID of the Dynoshaft controller. In this
situation no split adapter can work and a thin, flat, elastic band is supplied to shim up
the OD and act as the adapter and vibration isolation.

Tail shaft Housing Adapters

Proper Fitment of Adapter In Controller Clamp with Locating Ribs Between Clamp

Arms and Controller Body

This is a precision electronic measuring device, therefore you must ensure that hot
exhaust is not in close proximity controller. If there is a heat source near the controller
you *MUST* install a shield between the Dyno-Shaft and the hot component. In order to
protect itself, the Dyno-Shaft controller will automatically shut down when it’s driver
circuit reaches 250 degF. The parameter ”Control Temp” reports this temperature and
can be monitored to make sure the controller does not overheat. If the controller does

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