The issue with a psd auto trans is they have a 6 bolt torque converter and the idi auto has a 4 bolt converter. Otherwise they bolt up to the engines fine. Then as posted there is the computer differances. If you want an E4OD trans that bolts directly to your idi with a triple disc converter call Brians Truck Shop. BTS has the trans I have and it will not be hurt by the hp and torque we put out in our idi engines. Sun Coast also has a great E4OD trans as does a couple other makers that have been listed here before. I really like my BTS trans. I know its the last trans I will ever need.