SKU: 104960-01K Category:

6L80/6L90 4-5-6 Clutch Apply Piston kit

  • GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to OE design shortcomings. Insufficient clutch piston-to-plate apply surface area causes clutch plate failure, especially when apply pressures exceed OE specifications. The other problem is flexing and bowing of the backing plate (coning), which is a primary source of clutch failure.
  • A modified OE clutch apply piston and piston dam are used in conjunction with a specially-designed Sonnax piston apply ring.
  • A more rigid backing plate.
  • The Sonnax apply ring increases surface area between the apply piston and the OE waved clutch plate, resulting in more even distribution of apply force to the clutch plates.
  • The Sonnax backing plate minimizes flexing/bowing when clutch is applied, drastically reducing the likelihood of clutch plate distortion.
  • Solid backing plate design outperforms OE and aftermarket plates.
  • Increased apply ring surface area strengthens and reinforces assembly.

$145.00 USD

Description

6L80/6L90 4-5-6 Clutch Apply Piston kit

  • GM 6L80 and 6L90 transmissions often suffer failure of the 4-5-6 clutch assembly due to OE design shortcomings. Insufficient clutch piston-to-plate apply surface area causes clutch plate failure, especially when apply pressures excede OE specifications. The other problem is flexing and bowing of the backing plate (coning), which is a primary source of clutch failure.
  • A modified OE clutch apply piston and piston dam are used in conjunction with a specially-designed Sonnax piston apply ring.
  • A more rigid backing plate.
  • The Sonnax apply ring increases surface area between the apply piston and the OE waved clutch plate, resulting in more even distribution of apply force to the clutch plates.
  • The Sonnax backing plate minimizes flexing/bowing when clutch is applied, drastically reducing the likelihood of clutch plate distortion.
  • Solid backing plate design outperforms OE and aftermarket plates.
  • Increased apply ring surface area strengthens and reinforces assembly.

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