Ford E4OD/4R100 Reprogramming Shift Kit TransGo HD2

This is the TransGo E4OD-HD2 reprogramming kit for the Ford E4OD and 4R100 four-speed overdrive automatics. The E4OD ran from 1989 through 1998 and became the 4R100 from 1998 to 2004, and both units sit behind gas V8s, the 460 big block, and the 7.3L Power Stroke diesel in F-150, F-250 and F-350 Super Duty trucks, the E-Series vans, the Bronco, and the Excursion. Rather than replacing hard parts, this kit re-works the valve body so the transmission shifts the way a loaded truck needs it to.

Reach for it when you are fighting soft or slipping 1-2 and 2-3 shifts, a delayed or slam engagement into drive and reverse, converter clutch cycling, or a unit that runs too hot and cooks clutches under a trailer. The HD2 calibration raises line pressure and quickens the shifts, which cuts the clutch slip that burns frictions and glazes steels in the first place. You can tune shift firmness with the parts supplied, so a daily driver and a gooseneck tow rig can each get the feel they need.

The kit installs at the valve body, so on many trucks you can do it by dropping the pan and valve body without pulling or splitting the transmission, and it is also the standard reprogram to drop in during a full rebuild. It includes the recalibration springs, valves, and spacer-plate and check-ball changes with step-by-step TransGo instructions. This is a valve-body reprogramming kit, not an overhaul kit: it does not contain friction plates, steels, bushings, or a torque converter. Confirm your tag reads E4OD or 4R100 before ordering. Ships from the USA; handling in 1-2 business days.