Originally Posted by
VodeAn
The 2008 and 2009.0 G8 GT uses an E38 OS12624402 ECM and a T43 TCM, what other model year vehicles use this TCM? This would give a rough idea of what other TCM OS's are compatible.
Does the VIN need to match between the two controllers? Anything else?
FYI The TCM can be flashed separately from the ECM
1. Pull TCM fuse & read entire (call this baseline_ecmonly.hpt), re-insert the fuse when done
2. Write entire with desired TCM software (this will also flash the ECM), Pull tcm fuse
3. Write entire with baseline_ecmonly.hpt, re-insert the fuse when done
This process is cumbersome and AFAIK you have to be careful not to flash the ECM with an incompatible OS.
Really hoping for feedback here, I feel as though there has to be a solution to this problem.