Sonnax 34200-03K Transmission Boost Valve & Sleeve Kit (Factory Style) 4L80E

Description: 4L80-E, 4L85-E Transmission Boost Valve Kit Part No. 34200-03K Fits '91-later units with factory-style sleeve, no O-rings. Can be retrofitted to '89–91 units. See instructions for details. Common problems in vehicles with GM 4L80-E and 4L85-E transmissions are uncontrollable line rise (upward of 500-600 psi), high line pressure in Reverse, buzzing noise, broken direct clutch drums and/or broken cases. These problems are usually caused by Reverse boost oil that enters the torque signal circuit due to a wear-created cross leak at the sleeve. High line pressure and buzz is created by oil leakage past the aluminum balance plug. Sonnax boost vavle kit 34200-03K eliminates these problems. Hardened steel boost valve with over 20% wider spools to provide better durability and increased sealing contact area Boost valve spools have annular grooves to reduce side-loading that causes wear Valve and sleeve are manufactured to close tolerances to restore proper clearance and hydraulic integrity Kit includes a replacement aluminum balance oil plug with an O-ring to ensure proper sealing and adequate back pressure on the pressure regulator valve Note If you detect leakage between the sleeve and pump bore, use 34200-01K, which includes an O-ringed sleeve to compensate for pump bore wear and prevent pump scrappage. Contents Valve Sleeve Balance Plug With O-Ring

Price: 22.55 USD

Location: Columbus, Ohio

End Time: 2024-08-21T11:42:36.000Z

Shipping Cost: N/A USD