t5 to auto


what of the wiring harness do i need to get to change the t5 trans to an auto in a 2001 3.8 from the
ecu to the engine harness or do i need the engine side as well, i have a trans harness

and do 2001 - 2003 wiring harnesses for the 3.8 as the transmissions do, interchange? or does it have
to be from a 2001