Overdrive transmissions are a great thing.
They enable you to significantly improve the gearing and acceleration of your car, while maintaining gas mileage and highway cruisability. Unfortunately overdrives, manual or automatic, weren't offered in Ford vehicles until the late 70's. But that doesn't mean you have to be stuck with the non-overdrive C4's. C6's, and manual 4 speeds of the 60's. In fact on most early Fords, the swap is so easy it makes you wonder if Ford was thinking ahead. In this article we'll go over what it takes to swap in a T5 tranmisssion into an early Ford.