I have a friend who has an early model 454 (carbureted)truck and would like to upgrade his auto transmission to one with an overdrive. looking for sound advice as this is one area I am un-familiar with. Thanks for any help you can provide
A forum community dedicated to Chevrolet and GMC diesel truck owners and enthusiasts. Come join the discussion about duramax engines, performance, builds, modifications, classifieds, troubleshooting, maintenance, and more!