Originally Posted By ruderunner
Shifter still controlled PRND21, overdrive controlled by the computer. Switch was to lock out od.

Any 904 or 727 shifter will work. Only need a switch to turn off od when you want, can be on shifter or dash or...


...and if you don't use it to tow (often or long distances), I can't think of any reason you'd want to turn it off.