Description
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 those we can verify all data on that label.
ECU will show up ready to install and drive!
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 unit for functionality and codes. You will receive a comprehensive report telling you of our findings. This will give you the assurance that you made the right choice! 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!
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.
Signs your TCM may be failing
- Unit stuck in gear or limp mode
- Erratic or unpredictable shifting
- No communication with scan tool
- Dead shift pad (often accompanied by code 6927)
- Warning lights on dash
If you’re not sure it’s the TCM, Reaction Force offers free diagnostics over the phone.
Pre-replacement checks: WTEC 3 ECU ECB008ZN for Military Vehicles
- Inspect wiring harness – Look for signs of corrosion or damaged pins
- Check all grounds and battery voltage – Voltage should be within spec
- Inspect the TCM housing for water intrusion
- Scan for WTEC II codes using a compatible tool
Need help interpreting results? 📞 Call or text us at (917) 216-9743 or (360) 607-8921.
Frequently asked questions
- What does the ECB008ZN TCM do?
It manages all shifting functions in Allison WTEC II transmissions and communicates with the vehicle’s shift selector.
- How do I know if my TCM is bad?
Common signs include no response from shift pad, limp mode, gear selection errors, or codes like 6927 and 3513.
- Do I need to program this TCM?
Yes. It must be calibrated to your specific vehicle before it will work properly.
- Can I install this myself?
DIY install is possible, but we recommend professional programming and diagnostics to avoid costly mistakes.
- What shift pads work with this ECU?
Typically used with part #29507949 or 29522940.
Need support?
Reaction Force provides:
- Free bench testing
- Free phone diagnostics
- Shift selector + TCM compatibility guidance
- Installation and programming support
📞 Call Reaction Force LLC (503) 862-6322 today.
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.
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