Auto transmission swap

Space Grey

New Member
Sep 17, 2023
I’m swapping out the 6hp/19 with a built 6hp/21 and I’m unsure of a couple of things.
1: Will I have issues transferring the tcu from the 19 to the 21? The 21 will not have a zf tcu in it, it was controlled with HTG GCU.
2: Should I reset the adaptations in the tcu before installing in the 21?
3: Should I remove XHP from the tcu in the 19 completely and flash back to stock and drive the car a while before reinstalling XHP?

Any other suggestions on the swap would be greatly appreciated!