Description

Allison 29522940 Shift Selector WTEC II Pushbutton Shift Selector (Integral Pad)

The Allison 29522940 is a WTEC II pushbutton shift selector used with Allison automatic transmissions in medium- and heavy-duty applications. This is the integral-style selector configuration, designed to mount in the dashboard and connect to the WTEC II control system.

Allison’s service information states that when an integral Shifter/ECU assembly needs service, the shift selector and ECU can be replaced separately. It identifies documented WTEC II service relationship: PBSS / R29517003 ECU / 29522940 shift selector

and says the previous integral assembly 29517016 was cancelled and is serviced using the reman ECU and respective WTEC II selector.

Documented WTEC II ECU association: R29517003 with 29522940 PBSS selector. Other system configurations may vary; verify the existing ECU/TCM and selector part numbers before ordering.

This is a remanufactured WTEC II selector that is bench-tested before shipment. Verify the part number, connector configuration and vehicle/control-system application before ordering

Important notice about this item: We offer free diagnosis and bench testing of your unit. All you pay is shipping. Send us your unit and we will test the unit on our bench for proper operation and, where applicable, diagnostic faults. You will receive a comprehensive report telling you of our findings. This can help determine whether the selector is actually faulty before you purchase a replacement. Testing is completed the same day the unit is received. If unit is found to be in good working order we will advise fixes for any codes that are present including troubleshoot steps and wiring drawings. FREE!

Send us a message and we will go to work for you.

Allison Transmission WTEC 2 Selector Assembly, Pushbutton, Integral

Part number:

• 29522940

Related / Superseded Part Numbers:

• 29507938

Common Symptoms of a Failing Allison 29522940 Shift Selector

• Gear display not responding or flashing

• Buttons do not work

• Gear selection commands are not responding, or the vehicle remains in an unexpected range

• Code 2312 or other WTEC II selector-related faults. A diagnostic code should be evaluated along with selector operation, power, wiring, connector condition and communication before replacing the shift selector.

• Codes 6927–6929 also possible

• No communication with the TCM

When selector symptoms remain after power, wiring, connectors and communication have been checked, the shift selector may be the source of the problem. Bench testing can help confirm whether the selector is functioning properly before replacement.

Check These Things Before Replacing the 29522940

Before replacing the selector, check:

1. Power supply at selector connector – Verify power against the applicable OEM service specifications

2. Wiring harness & connector pins – Look for damage or corrosion

3. Scan for WTEC II fault codes – Look for 2312 or selector-specific faults

4. Grounds and ignition feed – Must be clean and tight

5. Moisture in selector housing – Common failure cause

Free bench testing

Already have a 29522940 that may be faulty? Send it to Reaction Force for free bench testing. Testing is completed the same day the unit is received. You pay only shipping.

Related diagnostic trouble codes

Codes that may be associated with selector or WTEC II control-system problems include 2312, 6927, 6928, 6929 and 6934. Proper diagnosis should include checking power, wiring, connectors and communication before replacing the selector. These codes are frequently linked to selector failure in WTEC II systems:

• 2312 – Shift selector failure

• 6927 – Selector communications fault

• 6928 – Pushbutton failure

• 6929 – Display error

• 6934 – TCM initialization fault (may result from pad failure)

29522940 Installation & Verification

• Follow applicable OEM service procedures.
• Confirm the selector and connector configuration match the original unit.
• Ensure connections are clean and secure.
• Verify display operation after installation.
• Verify gear/range selection.
• Check for stored diagnostic codes.

29522940 and the R29517003 ECU

Allison service information identifies 29522940 as the WTEC II PBSS selector used with the R29517003 remanufactured ECU for servicing the applicable integral shifter/ECU configuration. The selector and ECU can be serviced separately. Verify the original part numbers and system configuration before ordering.

Need help?

Reaction Force provides:

• Free diagnostics

• Bench testing before or after purchase

• Help identifying the correct WTEC II ECU/TCM

• Help verifying shift selector and ECU/TCM compatibility

Call Reaction Force LLC (503) 862-6322 today.

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Images are for representation purposes only. For reman purchases a photo of the actual item you are receiving will be sent for approval prior to shipping.

Frequently asked questions

1. What does the 29522940 shift selector do?
The Allison 29522940 is a WTEC II pushbutton shift selector that allows the driver to select the desired transmission range. It communicates with the WTEC II electronic control system.

2. What vehicles use this selector?
Common applications include transit buses, fire trucks, refuse trucks, motorhomes/RVs and other medium- and heavy-duty vehicles equipped with compatible WTEC II systems.

3. How do I know if this part is bad?
Symptoms can include a blank or flashing display, unresponsive buttons, incorrect range information or gear-selection commands that do not respond. WTEC II fault codes may also be present. Because similar symptoms can be caused by wiring, power or control-system problems, testing is recommended before replacing the selector.

4. Does this require programming?
The shift selector itself is not typically programmed like a replacement TCM. However, the selector must be compatible with the WTEC II control-system configuration and associated ECU/TCM. Verify the part number and connector configuration before installation.

Core Deposit Policy – Parts

Core deposit is fully refundable once complete, “like for like” unit is returned to RF LLC. Buyer pays return shipping and is responsible for any loss of item during shipping. If the unit returned is incomplete or not “like for like” a pro-rated refund will be applied.

Please see our warranty, shipping, refund, and return policies.