Sonnax 77998-03K Transmission Kit, 1-2 or 3-4 Accumulator Piston .310" Pin *

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  • Regular price $21.33


Sonnax 77998-03K Transmission Kit, 1-2 OR 3-4 Accumulator Piston (.310" Pin)

Symptoms:

  • Poor shift quality
  • Burnt clutches & bands

Cause:

Wear at the piston pin bore due to repeated reciprocation.

Correction:

The Sonnax patented pinless design with dual seals stabilizes the piston in the bore and provides improved sealing characteristics. Use of the Sonnax part eliminates the need for the pins.

200-4R, 4L60, 4L60-E, 4L65-E, 4L70-E

Pinless Accumulator Piston Kit
Part No. 77998-03K

In 200-4R applications, this kit can only be used in the 3-4 accumulator location.

In listed GM units it is common to have poor shift quality, burnt bands or clutches due to accumulator piston wear. Repeated reciprocation of the accumulator piston causes wear at the piston pin bore interface. After this wear reaches a critical point, fluid loss through the piston pin bore cannot be compensated due to lack of pump volume. In addition, the piston can get cocked and gall the accumulator bore due to the pin bore wear or the spring bottoming out. To prevent these conditions in the 1-2 or 3-4 accumulator bores, Sonnax offers pinless accumulator piston kit 77998-03K.

  • Pinless design eliminates the possibility of pin bore leakage and the additional length stabilizes the piston to prevent piston cocking
  • Dual seals stabilize and completely seal the bore and provide a tight seal even after thousands of cycles
  • Steel balls plug existing pin bore in case or cover
  • D-Ring Viton®
  • Pinless Accumulator Piston Aluminum
  • Seal PTFE
  • Steel Ball .312" dia.
  • Steel Ball .236" dia.
































Description


Kit; 1-2 & 3-4 Accumulator Piston; .310" Pin Diameter; Pinless Design; Includes Seal, D-Ring, Piston, 2 Steel Balls

Transmissions
  • THM200-4R | 1981 - 1990
  • THM700-R4 | 1987 - 1992
  • THM700-R4/4L60/MD8 | 1982 - 1993
  • 4L60-E-HD | 2002 - 2006
  • 4L65-E | 2001 - 2007
  • 4L70-E | 2006 - 2009
  • 4L60-E | 1993 - 2015

Specifications


Vehicle Fitment
Years Vehicle
1982 - 2004 Avanti II
1991 - 1992 Bentley Turbo R
1992 - 1992 Bentley Mulsanne
1991 - 1992 Bentley Continental
1991 - 1996 Buick Roadmaster
1982 - 1987 Buick Regal
2004 - 2007 Buick Rainier
1981 - 1990 Buick LeSabre
1981 - 1983 Buick Estate Wagon
1981 - 1989 Buick Electra
1991 - 1996 Buick Commercial Chassis
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2002 - 2006 Cadillac Escalade EXT
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1999 - 2006 Cadillac Escalade
1981 - 1984 Cadillac DeVille
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1987 - 1992 Cadillac Brougham
1989 - 1991 Chevrolet V3500
1987 - 1988 Chevrolet V30
1989 - 1991 Chevrolet V2500 Suburban
1987 - 1988 Chevrolet V20 Suburban
1987 - 1987 Chevrolet V20
1989 - 1991 Chevrolet V1500 Suburban
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1999 - 2001 Chevrolet Silverado 2500
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1983 - 1994 Chevrolet S10 Blazer
1983 - 2004 Chevrolet S10
1989 - 1991 Chevrolet R3500
1987 - 1988 Chevrolet R30
1989 - 1991 Chevrolet R2500 Suburban
1989 - 1989 Chevrolet R2500
1987 - 1988 Chevrolet R20 Suburban
1987 - 1988 Chevrolet R20
1989 - 1991 Chevrolet R1500 Suburban
1987 - 1988 Chevrolet R10 Suburban
1987 - 1987 Chevrolet R10
1982 - 1988 Chevrolet Monte Carlo
1982 - 1983 Chevrolet Malibu
1982 - 1986 Chevrolet K5 Blazer
1988 - 1989 Chevrolet K3500
1982 - 1986 Chevrolet K30
1992 - 1996 Chevrolet K2500 Suburban
1988 - 1998 Chevrolet K2500
1982 - 1986 Chevrolet K20 Suburban
1982 - 1986 Chevrolet K20
1992 - 1999 Chevrolet K1500 Suburban
1988 - 1999 Chevrolet K1500
1982 - 1986 Chevrolet K10 Suburban
1982 - 1986 Chevrolet K10
1981 - 1996 Chevrolet Impala
1983 - 1995 Chevrolet G30
1983 - 1995 Chevrolet G20
1983 - 1995 Chevrolet G10
2009 - 2015 Chevrolet Express Pasajeros
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1982 - 1987 Chevrolet El Camino
1982 - 2005 Chevrolet Corvette
1991 - 1993 Chevrolet Commercial Chassis
2004 - 2012 Chevrolet Colorado
1981 - 1996 Chevrolet Caprice
1983 - 2002 Chevrolet Camaro
1988 - 1990 Chevrolet C3500
1982 - 1986 Chevrolet C30
1992 - 1996 Chevrolet C2500 Suburban
1988 - 1999 Chevrolet C2500
1982 - 1986 Chevrolet C20 Suburban
1982 - 1986 Chevrolet C20
1992 - 1999 Chevrolet C1500 Suburban
1988 - 1999 Chevrolet C1500
1982 - 1986 Chevrolet C10 Suburban
1982 - 1986 Chevrolet C10
1987 - 2005 Chevrolet Blazer
2002 - 2006 Chevrolet Avalanche 1500
2007 - 2008 Chevrolet Avalanche
1985 - 2005 Chevrolet Astro
2000 - 2000 GMC Yukon XL 2500
2000 - 2008 GMC Yukon XL 1500
1992 - 2010 GMC Yukon
1987 - 1991 GMC V3500
1987 - 1991 GMC V2500 Suburban
1987 - 1987 GMC V2500
1987 - 1991 GMC V1500 Suburban
1987 - 1987 GMC V1500
1992 - 1993 GMC Typhoon
1991 - 1991 GMC Syclone
1991 - 2004 GMC Sonoma
1999 - 2001 GMC Sierra 2500
2001 - 2003 GMC Sierra 1500 HD
2007 - 2007 GMC Sierra 1500 Classic
1999 - 2013 GMC Sierra 1500
2007 - 2010 GMC Sierra
2009 - 2009 GMC Savana 4500
2006 - 2009 GMC Savana 3500
1996 - 2009 GMC Savana 2500
1996 - 2014 GMC Savana 1500
1985 - 2005 GMC Safari
1983 - 1991 GMC S15 Jimmy
1983 - 1990 GMC S15
1987 - 1991 GMC R3500
1987 - 1991 GMC R2500 Suburban
1987 - 1989 GMC R2500
1987 - 1991 GMC R1500 Suburban
1987 - 1987 GMC R1500
1982 - 1991 GMC K3500
1982 - 1996 GMC K2500 Suburban
1982 - 1998 GMC K2500
1982 - 1999 GMC K1500 Suburban
1982 - 1999 GMC K1500
1982 - 2005 GMC Jimmy
1983 - 1995 GMC G3500
1983 - 1995 GMC G2500
1983 - 1995 GMC G1500
2004 - 2005 GMC Envoy XUV
2002 - 2006 GMC Envoy XL
2002 - 2009 GMC Envoy
2004 - 2012 GMC Canyon
1984 - 1987 GMC Caballero
1982 - 1991 GMC C3500
1982 - 1996 GMC C2500 Suburban
1982 - 1999 GMC C2500
1982 - 1999 GMC C1500 Suburban
1982 - 1999 GMC C1500
2009 - 2010 Hummer H3T
2006 - 2010 Hummer H3
2003 - 2007 Hummer H2
1991 - 1991 Isuzu Pickup
2007 - 2008 Isuzu i-370
2006 - 2006 Isuzu i-350
2007 - 2008 Isuzu i-290
2006 - 2006 Isuzu i-280
1996 - 2000 Isuzu Hombre
2003 - 2008 Isuzu Ascender
1982 - 1985 Oldsmobile Toronado
1981 - 1985 Oldsmobile Delta 88
1982 - 1988 Oldsmobile Cutlass Supreme
1985 - 1987 Oldsmobile Cutlass Salon
1982 - 1983 Oldsmobile Cutlass Cruiser
1982 - 1984 Oldsmobile Cutlass Calais
1985 - 1987 Oldsmobile Cutlass
1981 - 1992 Oldsmobile Custom Cruiser
1991 - 2004 Oldsmobile Bravada
1981 - 1984 Oldsmobile 98
1987 - 1989 Pontiac Safari
1982 - 1986 Pontiac Parisienne
2004 - 2006 Pontiac GTO
1983 - 1987 Pontiac Grand Prix
1983 - 2002 Pontiac Firebird
1981 - 1981 Pontiac Catalina
1981 - 1986 Pontiac Bonneville
2005 - 2009 Saab 9-7x


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