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Sonnax 77701-076 Servo Release Check Valve 700R4 4L60E 4L65E 4L70E 2nd Gear Automatic Transmission

OPT Product Code: SNX-77701-076
$25.37
(5) Reviews: 1
Sonnax 77701-076 Servo Release Check Valve 700R4 4L60E 4L65E 4L70E 2nd Gear Automatic Transmission

Product Details


Sonnax 77701-076 servo release check valve kit for the GM 700R4, 4L60, 4L60E, 4L65E, 4L70E, 4L75E automatic 4 speed automatic transmissions.

  • Part number: 77701-076
  • Brand: Sonnax
  • Transmission models: 700R4, 4L60E, 4L65E, 4L70E, 4L75E
  • Makes: GM, Cadillac, Chevrolet, GMC, Pontiac, Oldsmobile, Hummer, Isuzu, Saab
  • Installs without transmission removal: Yes.
  • Kit contains: Check valve and o-ring.
  • Valve must be used with properly functioning OE capsule.

Sonnax has devolved a way to successfully extend the life of 3-4 clutches and improve the 2-3 shift feel. The 4L60 (TH700-R4) and 4L60E series transmissions have had an issue with band life since they were first introduced. Inadequate metering of 2nd gear band servo release oil causes 3-4 clutch failure. The 3-4 clutch and 2nd Gear band are not properly synchronized. Sonnax servo release check valve kit 77701-076 is a unique solution that combines an orifice with a ball check valve to resolve these problems.

  • Improved design meters servo release oil, reducing 3-4 clutch failure.
  • Provides sufficient exhaust so that 3-2 downshifts are smooth.
  • Calibrates 3-4 clutch feed orifice without creating shift concerns.
  • Drop-in Zip Valve™ parts install quickly and easily.

This 2nd gear band servo release check valve kit works with the following makes and models:

Buick

  • Rainier, 2004-2007
  • Roadmaster, 1992-1996

Cadillac

  • Brougham, 1994-1997
  • Escalade, EXT, ESV 1999-2006
  • Fleetwood, 1994-1997

Chevrolet

  • Astro Van, 1985-2005
  • Avalanche, 2002-2008
  • Blazer, 1982-2005
  • C1500, some C2500, 1993-1999
  • Camaro, 1982-2002
  • Caprice, 1982-1996
  • Corvette, 1982-2005
  • Impala SS, 1994-1996
  • S10, 1993-2004
  • Silverado Truck, 1982-2013
  • SSR, 2003-2007
  • Suburban, 1982-2013
  • Tahoe, 1993-2013
  • Trailblazer, 2001-2009
  • Van, 1983-2013

GMC

  • Canyon, 2004-2012
  • Colorado, 1994-2012
  • Envoy - XUV – Denali, 2001-2010
  • K1500, Some K2500, 1993-1999
  • Safari Van, 1985-2005
  • Sierra Truck, 1982-2013
  • Sonoma, 1993-2004
  • Syclone 1991-1993
  • Typhoon 1991-1993
  • Van, 1983-2013
  • Yukon, 1993-2013

Hummer

  • H2, 2003-2007
  • H3, 2006-2011

Isuzu

  • Ascender, 2003-2009
  • Hombre, 1996-2000
  • Pickup, I280, I350, I290, I370 2006-2009

Oldsmobile

  • Bravada, 1991-2004
  • Custom Cruiser Wagon, 1982-1992

Pontiac

  • Firebird & Trans Am, 1983-2002
  • GTO, 2004-2006

Saab

  • 9-7, 2005-2009

These transmissions are part of the Turbo-Hydramatic series and are also known as: 700R4, 4L60, 700-R4, TH700-R4, MD8, THM700R4, THM700-R4, 4L60E, 4L60-E, 4L65E, 4L65-E, 4L70E, 4L70-E, 4L75E, 4L75-E, M30, M32, M70.

This servo release check valve kit works in all models and years of this transmission, including: 1982, 1983, 1984, 1985, 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, and 2013.

Sonnax 77701-076 Servo Release Check Valve 700R4 4L60E 4L65E 4L70E 2nd Gear Automatic Transmission

OPT Product Code: SNX-77701-076
$25.37

(5) Reviews: 1
23 In Stock
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Does what it says
Not sure if I had a transmission that had more problems than others, but this made a difference in the transmission shift feel. The last transmission didn't last as long as I was hoping. mechanic friend told me this was a good idea to try.
WN
12/29/2023
Verified Buyer
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