Faulty TCM?

[galant96s]

I have a 96 galant s auto, the engine went south(broken timing belt) and we were lucky enough to find a totaled 97(motor/tranny still good) locally for cheap. We swapped the motor/tranny from the 97 to the 96 and things were great for about 4 months. Now, no reverse and very clunky in forward gears(like in BAD need of tune up). The engine runs smooth in park then but not in forward gears. I have read similar symptoms and the diagnosis was the TCM. Does this sound accurate to you guys? Suggestions?

[Galanttuner10]

do you still hve the other auto tranny? swap it in and see what happens. if its the same then its the tcu. my auto did this 4 times all the tranny blew up. now im 5 speed and that soled all the issues