Description
2008 Ford Truck 6.4L TCM 8C3A-12B565-A | 8C3A12B565A Repair Service
2008 Ford Truck 6.4L Transmission Control Module 8C3A-12B565-A Repair
Model: F250, F350
Part Number[s]: 8C3A-12B565-AA, 8C3A12B565AA 8C3A-12B565-AB, 8C3A12B565AB 8C3A-12B565-AC, 8C3A12B565AC 8C3A-12B565-AD, 8C3A12B565AD 8C3A-12B565-AE, 8C3A12B565AE
What Does a 6.4L TCM Do?
Think of the TCM as the brain of your transmission. It watches the sensors, decides when to shift, and even manages torque converter lock-up. When it’s healthy, shifts are smooth and predictable. When it starts to fail? You’ll notice. Delays, harsh clunks, or worse — limp mode that locks you in one gear.
Warranty
One year.
TCM Common Problems
- Harsh or slipping shifts, especially under load
- Delayed engagement when shifting into drive or reverse
- Truck stuck in limp mode (one gear only)
- Check engine light with transmission codes
- If these sound familiar, the TCM is likely the issue.
Why trust us
Our engineering team has over 15 years of experience, has repaired more than 10K ECMs, and uses the latest simulation technology. We are always happy to assist you with any technical assistance we can. Feel free to contact us if you wish to discuss the faults you are experiencing before sending in your parts.