VAN FULL SIZE 2500 96-03 4 SP RWD V6 4.3L V8 4.8L/5.7L/6.0L/8.1L 6.5L DIESEL
VAN FULL SIZE 2500 04-08 4SP RWD/AWD V8 6.0L
VAN FULL SIZE 2500 06-08 4 SP RWD V8 6.6L DIESEL
VAN FULL SIZE 3500 95-03 4 SP RWD V6 4.3L V8 4.8L/5.7L/6.0L/7.4L/8.1L/6.5L
VAN FULL SIZE 3500 04-08 4 SP RWD V8 4.8L/6.0L
VAN FULL SIZE 3500 06-08 4 SP RWD V8 6.6L DIESEL
YUKON 2500 04-06 4 SP RWD/4X4 V8 6.0L
YUKON 2500 04-06 4 SP RWD/4X4 V8 8.1L
YUKON 2500 07 4 SP RWD 4X4 V8 6.0L
FITS THESE 4L80E BENTLEY & ROLLS ROYCE MODELS:
BENTLEY ARNAGE '02-'06
ROLLS ROYCE ARNAGE / SILVER SERAPH '00-'03 6.8L
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.
Kit contains instructions to retrofit parts dating back to 1989.
Common problems in vehicles with a 4L80-E transmission 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. The Sonnax replacement assembly 34200-03K eliminates these problems.
SONNAX 34200-03K
FACTORY STYLE SLEEVE
INSTALLATION INSTRUCTIONS INCLUDED
PHOTO SHOWS ACTUAL SONNAX BOOST VALVE & SLEEVE KIT
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