overdrive cable

[raycow]

Originally Posted by northerngmc

How hard are these 3 spd OD units to find? I have always wanted to put one in my 59 GMC to help with highway speeds.

Overdrive transmissions aren't particularly scarce. They turn up on ebay and craigslist all the time. If your truck is 72 or older you can use any of the car or truck overdrive transmissions back to 55. If it is 73 or newer and needs a rear mount, use a car OD from 58 or later.

Ray