AOD vs. 4R70W While our transmission was strewn out before us on Glassbrenner's bench, he was able to show us the hard part differences among the 4R70W and its predecessors, the AOD and AOD-E.

Read on about this stock 5R55S auto transmission being replaced by an all new Lentech 4R70W overdrive unit. More details and photos of the swap only in Muscle Mustang & Fast Fords ...

Our 4R70W is a great testbed to show just what goes into an automatic transmission rebuild since it was used in such a wide variety of trucks. Ford’s AOD transmission begat the AODE, which then ...