TCM replacement A40 for 6sp Allison 06-08

Used replacement model A40 TCM module for the 6 speed Allison transmissions in LBZ and LMM trucks from 2006-2008. Programmed to your VIN and stock calibration

The 2009-2010 LMM and 2011-2014 LML trucks used the A50/T14 module. Please be sure to check what your vehicle has in it. It is etched into the case in very fine detail.

These things used to be commonly available, but suddenly in short supply so the price has gone nuts. -JK

Requires core sent in advance. I did not diagnose your vehicle. If the TCM does the exact same thing the original did then odds are you misdiagnosed.