Sonnax 34200-10K Transmission Boost Valve & Sleeve Kit, Self-Regulating

Brand: SonnaxOther Part Number: S34507RAKInterchange Part Number: S34507HRKItems Included: Boost Valve KitManufacturer Part Number: 34200-10KMaterial: SteelUniversal Fitment: YesVintage Part: NoPerformance Part: Yes 4L80-E, 4L85-E Transmission Boost Valve KitPart No. 34200-10K With encapsulated relief valve. Common problems in vehicles with GM 4L80-E and 4L85-E transmissions include uncontrollable line rise (upward of 500 psi), high line pressure in Reverse, broken direct clutch drums and/or broken cases. These problems can be caused by excessive EPC torque signal pressure. Sonnax self-regulating boost valve kit 34200-10K eliminates these problems by limiting EPC pressure. Hardened steel boost valve has an encapsulated relief valve that will allow EPC pressure to exhaust if it exceeds 95-105 psi Boost valve with over 20% wider spools to provide better durability and increased sealing contact area Boost valve spools have annular grooves