Anyone successfully carried out a ZF swap without using your original mechatronics unit /or swapping your TCM onto the new mechatronics body. If say you had a 2009 FG and were to use a box from a 2013 FG, could you flash the new transmission with your calibration file or would the conflict of processor codes/hardware/software version cause a drama.
Also Im getting a P code when car going into revere that triggers limp home mode which goes away after a key cycle. Car is fine in all forward gears. Serviced the transmission today with new oil and filter but problem still exists.