Fits Ford E4OD/4R100 1996-2004 transmission Main Valve body with F6 Casting Code; With 2 Large and 2 or 3 SMALL balls located in the lower Main VB area. Gas and Diesel Trucks Includes (3) Steel replacement 2-3 Shift Valves. Enough to fix 3 separate units. Fixes repeated stuck 2-3 shift valve that causes no 3rd or 4th but reverse is OK. Convenient drop in valves, No special tooling or machining necessary! Installation recommendation: Experienced technician Transmission removal necessary: No