Sonnax Boost Valve Kit for 4L60E, 4L65E Transmissions
Early Style, .470" Diameter, OE Ratio, O-ring Style
GM 4L60-E and 4L65-E transmissions are often plagued by inadequate line rise, which can lead to the failure of the 3-4 clutch and 2-4 band, or result in poor shift quality. The frequent cycling of the EPC solenoid induces rapid wear on the boost sleeve. This wear allows oil that enters the torque signal orifice to leak past the boost valve and exhaust at the Reverse orifice, compromising line rise. Additionally, Reverse oil can leak both to the sump and back through the torque signal orifice. The external diameter of the boost sleeve is also prone to leakage through the pump body, further reducing pressure rise.
The Sonnax boost valve kit, part number 77898E-4K, is designed as a large OE ratio assembly that restores hydraulic integrity and prevents leakage in units with early-style pumps. This kit is part of the Drop-in Zip Valve™ series, designed for quick and effortless installation. Refer to the chart above for further usage details and alternative boost valve options.
Contents
- Sleeve
- O-Rings (2)
- Valve 0.470", 1 Groove
Dimensions
- Outside Diameter: 0.470 in
- Length: 1.907 in
Also available:
Boost Valve Kit Early style Sonnax 0.490in Diameter x 1.907in Long increased ratio O-ring style 4L60E 4L65E
Transmissions: 4L70E (M70) 2004-UP, 4L65E (M32) 1993-UP, 4L60E (M33,M30) 1993-UP
Vehicle
BUICK
RAINIER 2003-2007 4 SP R/4WD L6 4.2L V8 5.3L
ROADMASTER SEDAN, ROADMASTER WAGON 1995-1996 4 SP RWD V8 5.7L
CADILLAC
ESCALADE/ESV/EXT 1999-2006 4 SP R/4WD V8 5.3L 5.7L 6.0L
FLEETWOOD, BROUGHAM, LIMO 1995-1996 4 SP RWD V8 5.7L
CHEVROLET
AVALANCHE 2006-2008 4 SP R/4WD V8 6.0L
SILVERADO 1998-2013 4 SP R/4WD V6 4.3L V8 4.8L 5.3L V8 6.0L
SUBURBAN 1500 1995-2008 4 SP R/4WD V8 4.8L 5.0L 5.3L 5.7L V8 6.0L
TRAILBLAZER, ENVOY, TRAILBLAZER 1999-2009 4 SP R/4WD L6 4.2L V8 5.3L V8 6.0L
CORVETTE, ASTRO, BLAZER, CORVETTE, SONOMA, S/T PICK-UP, SAFARI 1995-2005 4 SP RWD V8 5.7L 6.0L
SSR 2003-2006 4 SP RWD V8 5.3L 6.0L
AVALANCHE 2001-2008 4 SP R/4WD V8 5.3L 8.1L
C/K, PICK-UP 1500, C/K, PICK-UP 2500, C/K, PICK-UP 3500(95) 1995-1997 4 SP R/4WD V6 4.3L V8 4.8L 5.0L 5.3L 5.7L 6.0L
C-1500 2001-2015 4 SP 4WD V8 5.3L
CAMARO 1995-2002 4 SP RWD V6 3.4L 3.8L V8 5.7L
CANYON 2003-2013 4 SP R/4WD L4 2.8L 2.9L V6 3.5L L5 3.7L V8 5.3L
CAPRICE SEDAN, CAPRICE WAGON, IMPALA 1995-1996 4 SP RWD V8 4.3L 5.7L
COLORADO 2003-2012 4 SP R/4WD L4 2.8L 2.9L L5 3.5L 3.7L V6 3.6L V8 5.3L
EXPRESS 1997-2016 4 SP R/4WD V6 4.3L V8 5.3L
TAHOE 1995-2013 4 SP R/4WD V8 4.8L 5.3L 5.7L
VAN FULL SIZE 1500-2500 1995-2011 4 SP RWD V6 4.3L V8 4.8L 5.0L 5.3L 5.7L 6.5L DIESEL
VAN FULL SIZE 3500 1995-1999 4 SP RWD V6 4.3L
GMC
SIERRA 1500 1998-2013 4 SP R/4WD V6 4.3L V8 4.8L 5.3L V8 6.0L
YUKON XL 2007-2008 4 SP R/4WD V8 6.0L
SIERRA 1500 1998-2013 4 SP R/4WD V6 4.3L V8 4.8L 5.3L V8 6.0L
YUKON , YUKON , YUKON XL 2000-2011 4 SP R/4WD V8 4.8L 5.3L 6.0L
YUKON XL 2000-2011 4 SP R/4WD V8 4.8L 5.3L 6.0L
SAVANA 1997-2016 4 SP R/4WD V6 4.3L V8 4.8L 5.3L
SIERRA 1500 1998-2013 4 SP R/4WD V6 4.3L V8 4.8L 5.3L V8 6.0L
HOLDEN
ADVENTRA 2004-2007 4 SP 4WD V8 5.7L
COMMODORE 2000-2011 4 SP RWD V6 3.6L 3.8L V8 5.7L
MONARO 2001-2006 4 SP RWD V8 5.7L
ISUZU
ASCENDER 2003-2008 4 SP R/4WD L6 4.2L V8 5.3L
HOMBRE 1997-2000 4 SP RWD L4 2.2L V6 4.3L
I SERIES (290, 370) 2006-2008 4 SP R/4WD L4 2.8L 2.9L L5 3.5L 3.7L
OLDSMOBILE
BRAVADA 1995-2004 4 SP R/4WD V6 4.2L 4.3L
PONTIAC
GTO 2004-2006 4 SP RWD V8 5.7L 6.0L
FIREBIRD 1995-2002 4 SP R/4WD V6 3.8L V8 5.7L
SAAB
9'7X 2005-2009 4 SP R/4WD V6 4.2L V8 5.3L
SUZUKI
Vitara 2000-2004 4 SPD RWD,4WD
Alternate Words: Automatic Transmission, Reprogramming, Improvement , Correction, Shift , Valve Body Rebuild Kit, 77898E4K