4L60E 4L65E 4L70E 2-Pinless Accumulator Piston Kits & 1 Forward Piston Sonnax

4L60E 4L65E 4L70E 2-Pinless Accumulator Piston Kits & 1 Forward Piston Sonnax

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Set of 2 Pinless Accumulator PISTON KITS

1 Forward Accumulator Piston Kit
or 4L60E 4L65E 4L70E GM Transmissions

Each Kit Includes:
  • Pinless Accumulator Piston
  • D Ring
  • PTFE Seal
  • 2 Steel Balls
  • Technical Instructions


In GM 4L60E, 4L65E and 4L70E 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. This kit prevents these conditions in the 1-2 or 3-4 accumulator bores.

  • 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.




Hummer (H3) (H3T) 2006-2010 V8 5.3L

Buick Rainer 2004-2007 L6 4.2L V8 5.3L

Roadmaster, Wagon 1994-1996 V8 5.7L

Cadillac Escalade, ESV, EXT 1999-2007 V8 5.3L 5.7L 6.0L

Fleetwood, Brougham 1993-1-996 V8 4.9L 5.7L

Limo 1993-1996 V8 4.9L 5.7L

Chevrolet Astro Van, GMC Safari 1995-2007 V6 4.3L

Avalanche 2001-2009 V8 5.3L

Blazer, Jimmy 1993-2007 V6 4.3L V8 5.3L

Envoy, Trailblazer 1993-2009 L4 2.2L L6 4.2L V6 4.3L V8 5.3L

Camaro 1994-2002 V8 5.7L

Caprice, Wagon 1993-1996 V6 4.3L V8 5.0L 5.7L

Colorado, Canyon 2004-2011 L4 2.8L L5 3.5L L4 2.9L L5 3.7L V8 5.3L

Express, Savana 1996-2011 V6 4.3L V8 4.8L 5.3L 5.7L

Impala 1994-1999 V8 5.7L

S10, S15, Jimmy, Sonoma 1993-2004 L4 2.2L 2.5L V6 4.3L

Silverado, Sierra 1500-3500 1995-2010 V6 4.2L V6 4.3L V8 4.8L 5.0L 5.3L V6 5.4L 5.7L 6.0L

Suburban 1500-2500 1993-2008 V8 4.8L 5.L 5.3L 5.7L

Tahoe, Yukon 1993-2009 V8 4.8L 5.0L 5.3L 5.7L

Isuzu Ascender 2003-2009 L6 4.2L V8 5.3L 5.4L

Hombre 1997-2000 L4 2.2L V6 4.3L

i280 2006 L4 2.8L

i290 2007 L4 2.9L

i350 2006 L5 3.5L

i370 2007-2009 L5 3.5L

Oldsmobile Bravada 1993-2004 L6 4.2L V6 4.3L

Pontiac Firebird 1994-2002 V6 3.4L 3.8L V8 5.7L

GTO 2004 V8 5.7L

SAAB 9-7, 9-7X 2005-2009 L6 4.2L V8 5.3L



Hummer (H2)(H2 SUT) 2004-2007 V8 6.0L 4SPD RWD 4X4

Buick Rainer 2004-2007 L6 4.2L V8 5.3L 4SPD RWD AWD

Chevrolet Express, GMC Savana 1996-2011 V8 4.8L 5.3L 5.7L 4SPD RWD 4X4

Blazer, Jimmy 1992-2007 V6 4.3L V8 5.3L 4SPD RWD 4X4

Envoy, Trailblazer 1992-2009 V6 4.3L V8 5.3L 4SPD RWD 4X4

SSR 2003-2007 L6 4.2L V8 5.3L 6.0L 4SPD RWD


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