Pump Parts

5L40E 5L50E Pressure Regulator Valve Kit | Sonnax

5L40E 5L50E Pump Pressure Regulator Valve Kit Sonnax Part Number: 55211-08K TOOLING REQUIRED 55211-TL8 In GM 5L40-E and 5L50-E transmissions, constant oscillation of the pressure regulator valve can cause excess bore wear, resulting in oil pressure...

5L40E 5L50E Boost Valve Kit | Sonnax | .531'' & .492'' Valve Spools

5L40E 5L50E Pump Boost Valve Kit PERFORMANCE RATIO WITH 0.531'' AND 0.492'' DIAMETER VALVE SPOOLS Sonnax Part Number: 55209-01K NO TOOLING REQUIRED Vehicles with GM 5L40-E and 5L50-E transmissions are prone to poor line rise or high Reverse pressure...

5L40E 5L50E Boost Valve Kit | Sonnax | .474'' & .441'' OE Spools

5L40E 5L50E Pump Boost Valve Kit OE RATIO WITH .474'' & .441'' DIAMATER VALVE SPOOLS Sonnax Part Number: 55209-04K NO TOOLING REQUIRED Vehicles with GM 5L40-E and 5L50-E transmissions are prone to poor line rise or high Reverse pressure problems...