Originally Posted by CarportMechanic
RADesign sells manual shifters for these trans. Check out their site, he has wiring diagrams to wire the 2 shift solenoids and the TC lock solenoid.
I have the shifter in my rig. It works well. I wired it so I can do manual override or have the ECU take over and shift like normal.
Its really pretty simple, the connection on your trans that has 3 wires coming from it is the one you want. All you have to do is apply 12v power to the solenoids to have them work.