Allison TCM Transmission Control Module Repair & Rebuild – P/N 29511212

Product Description

Allison TCM Transmission Control Module Repair & Rebuild – P/N 29511212

The Allison Transmission Control Module (TCM) P/N 29511212 is responsible for managing transmission operation, including shift timing, gear selection, torque converter clutch control, and communication with the engine control system. When the TCM develops an internal electronic fault, it can lead to poor transmission performance, communication failures, or even place the transmission into limp mode. Typical symptoms include harsh or delayed shifting, failure to shift, incorrect gear selection, warning lights, and diagnostic communication errors.

At Unitech Electronics, we specialize in the professional repair and rebuilding of Allison TCM modules. Every unit is carefully inspected, diagnosed, and repaired at the component level using professional electronic repair equipment. Damaged electronic components, solder joint failures, power supply circuits, communication circuits, and other internal faults are repaired whenever possible. After repair, each module undergoes comprehensive bench testing to verify reliable operation before it is returned to the customer.

Common Symptoms
Transmission stuck in limp mode
Harsh or delayed shifting
No shifting or incorrect gear changes
Loss of communication with the TCM
Check Engine or Transmission warning light
Intermittent transmission operation
Gear selection problems
Vehicle stuck in one gear
No communication during diagnostics
Internal electronic failure
Our Repair Service Includes
Complete electronic diagnosis
Component-level repair
Replacement of failed electronic components
PCB repair and restoration
Connector inspection
Bench testing after repair
Quality assurance inspection

Benefits of Repair

Significantly lower cost than replacement
Original module is retained
No core exchange required
Fast turnaround time
One-year warranty on repaired hardware