Shift Rite Transmissions replacement for 4R100 96-04 HD HP 4R100 Accumulator Body Sonnax Transgo Update Valve E4OD Transmission Shift Rite 4R100 96-04 e4od/4r100 with casting number #rff6 will work with pto and non pto Sonnax and transgo parts is already installed Hi-performance and heavy duty Sonnax spring kit and transgo steel valve and sleeve kit