I have a non i/c 90 250 2wd with the 3 speed no o/d. Its got over 400k and on it's way out. I'd like to o/d the trans with a small performance rebuild. Not sure of tran specs or best options any help and suggestions would be great.
If your wanting to go to an OD trans the prefered one is a 618/47RH. They are used in the 94/95 year model CTD trucks. It has OD with a lockup converter. There are some good rebuild parts for it if you want to turn the power up on your truck. If you don't plan on high power then a stock rebuild kit with a good aftermarket converter will do you fine.
Your truck doesn't have a PCM for control of the OD and lockup. You would need to make provisions for that. You could use eather toggle switches or pressure switches to do it.
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