Abstract: A pressure sensitive valve designed to relieve oil pressure accumulation in the 3rd/4th clutch assembly on a Hydramatic 4L60/E automatic transmission is provided. Pressure relief is accomplished by a compression spring and a valve member, located in the valve housing. When unwanted pressure has accumulated in the 3rd/4th clutch circuit (whilst the transmission is in 1st or 2nd gear) the predetermined tension of the compression spring holds the valve member off its seat, thus allowing unwanted oil pressure to flow through the interior space of the housing and exhaust through the orifice. When full oil pressure is applied in the 3rd/4th clutch circuit the compression spring collapses and allows the valve member to seal on the valve seat of the housing.