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Discussion Starter · #1 ·
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.
 

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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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