Yeah, you have a bad TCM.... clearly. There were issues before you changed transmissions, and after..... so it's not the hardware. Id reprogram it at a minimum or replace it. Did you verify the harness isn't pinched anywhere?
Need pin out for transmission plug
I need a pin out for my 2006 awd transmission connector. All the ones I have found in previous threads is not correct for my vehicle. I’ll post the ones I found below. My tbss is stuck in limp mode has like 10 codes it’s a brand new performabuilt
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