Just purchased a 2002 9-5 aero wagon three days ago. Test drove it and ran great besides needing motor mounts. Drove it home two hours but 20 minutes in transmission started shifting very rough and P0785 code. The car will now barely move from a stop. I have an 02 3.0t with no problems and I’ve heard the tcm’s are a problem with the 02 Aeros, is it possible to put the TCM from my 02 3.0t in my 02 Aero to see if it gets any better?