Hello all. So I've recently purchased a 2020 ST in which the transmission has failed. It went from hard shifts to slipping in neutral, I pulled the dip stick and the fluid is majorly burnt. I have a local shop who has quoted me $5700 to replace with a reman unit. Apparently parts to rebuild are on backorder (valve body, etc). I asked him if I could source a salvaged trans to replace instead, he said he was willing to try it, however he was unsure if the new trans would play nicely with the existing TCU, like they're mated together essentially. Can anyone confirm whether or not this is even an issue? I want to say it shouldn't be but that's also pure assumption.