Shift Rite Transmissions Ford replacement for 4R100 96-UP Main Lower Valve Body W/Updated Transgo 23 Valve Shift Rite 4R100 Transgo 2-3 valve shift kit update E4od/4r100 withcasting #rff6 The 2-3 valve sticking is a very common problem with this transmission, and is a must for any rebuild! Will work with most e4od/4r100 transmissions (except 98-up units with the pto (not common)).