Ford E4OD & 4R100 Transmission Transgo Accumulator Kit. This Shift Correction Kit from Transgo will improve all E4OD & 4R100 Transmissions from 1989-Up. Fits Ford E4OD/4R100 1989-2004 transmission accumulator bodies for Gas and Diesel Trucks. Includes (3) Steel Line Regulator valves, Replaces OEM Aluminum Valves. Recently upgraded to include New OEM .372 size Line Boost valve and bushing. Addresses Missing gear, clutch burnup, quick too Harsh shifts and/or long too Soft shifts. Convenient drop in valves, No special tooling or machining necessary! Installation recommendation: Experienced technician. Transmission removal necessary: No