Description
Allison 29561675 WTEC III Electronic Control Unit
We can calibrate to match your existing ECU. Just send us your CIN (calibration identification number) to parts@reactionforcellc.com. Or, if you can take a picture of all labels on your current unit and message us with those so we can verify all data on that label. Your ECU will be calibrated for the applicable configuration before shipment and ready for installation. Includes a 6 month warranty for full refund or exchange.
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 put it on our custom bench and 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 ECU is actually faulty before you purchase a replacement. Testing is completed the same day the unit is received. All testing will be performed within same day of receiving item. 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!
29561675 ECU Calibration
The Allison 29561675 requires the appropriate calibration for the applicable transmission and vehicle configuration. Reaction Force can review the CIN (Calibration Identification Number) from your existing ECU or the information shown on its labels. Send the CIN or clear photos of all labels to parts@reactionforcellc.com so we can help verify the correct calibration before shipment.
Calibration is included with this product as applicable to the order.
Send us a message and we will go to work for you.
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.
Is the 29561675 a WTEC II or WTEC III ECU?
The Allison 29561675 is a WTEC III Electronic Control Unit (ECU). It should not be assumed to be interchangeable with WTEC II control units. Verify the part number, control-system generation and calibration information on your existing ECU before ordering.
Common Symptoms of a Failing Allison 29561675 ECU
- Transmission remains in an unexpected range or operating mode
- Erratic or abnormal shifting
- Transmission-control functions not operating correctly
- Loss of communication with the ECU
- Transmission-related warning lights or diagnostic codes
- Repeated initialization or internal ECU faults
- ECU fails bench testing or cannot communicate with applicable diagnostic equipment
These symptoms can also be caused by power supply, grounds, wiring, connectors, sensors or other transmission-control components. Proper diagnosis is recommended before replacing the ECU.
Before replacing the ECU, check:
- ECU power supply and grounds against applicable OEM specifications
- ECU connectors for corrosion, damaged pins or poor connections
- Wiring harness for damage or open/short circuits
- Signs of water or moisture intrusion
- Diagnostic codes and communication with the ECU
- Existing ECU part number
- Calibration identification number (CIN) and other ECU label information
Need help interpreting results? Call us at (503) 862-6322.
Frequently asked questions
- What does the Allison 29561675 ECU do? The Allison 29561675 Electronic Control Unit (ECU) manages electronic transmission-control functions and processes information from the transmission and vehicle systems according to its calibration.
- How do I know if my ECU is bad? Common signs can include transmission control problems, unexpected operating range, erratic shifting, loss of communication with the ECU, warning lights or diagnostic codes. Similar symptoms can also be caused by the shift selector, wiring, power supply, connectors or other transmission-control components. Proper diagnosis is recommended before replacing the ECU.
- Do I need to program this ECU? Yes. The 29561675 ECU requires the appropriate calibration for the applicable transmission and vehicle configuration. Reaction Force can review the calibration information from your existing ECU and provide calibration service when applicable. Send us the CIN or clear photos of all labels on your current ECU so we can help verify the correct configuration before ordering.
- Can I install this myself? DIY install is possible, but we recommend professional programming and diagnostics to avoid costly mistakes.
- What shift selector works with the 29561675 ECU?
The correct shift selector depends on the WTEC III control-system configuration and vehicle/transmission application. Verify the selector part number and connector configuration before ordering. Reaction Force can help verify the correct ECU and shift-selector combination from the existing unit information. See the Allison 29538373 WTEC III Pushbutton Shift Selector.
Need support?
Reaction Force provides:
- Free bench testing
- Free phone diagnostics
- Installation, programming, and calibration support
Call Reaction Force LLC (503) 862-6322 today.
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