No 3-4 shift Archives - Transmission Digest
The 4R100 with a Mysterious No 3-4 Shift

A friend of mine who owns a local transmission shop called me recently to see whether I could help with a difficult problem he was having with a transmission. He had taken in a Ford truck with a 4R100 transmission that had no fourth gear. The fluid was badly burnt and there was a lot of clutch material in the pan.