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4L60E 4L65E 4L70E Pinless Forward Accumulator Piston Kit Sonnax FWD, 1-2 and 3-4
4L60E 4L65E 4L70E Pinless Forward Accumulator Piston Kit Sonnax FWD, 1-2 and 3-4
4L60E 4L65E 4L70E Pinless Forward Accumulator Piston Kit Sonnax FWD, 1-2 and 3-4

4L60E 4L65E 4L70E Pinless Forward Accumulator Piston Kit Sonnax FWD, 1-2 and 3-4

$ 20.43

Availability: 40 in stock
  • Condition: New
  • Return shipping will be paid by: Seller
  • Item must be returned within: 30 Days
  • Manufacturer Part Number: 77987-01K, (2) 77998-03K
  • Refund will be given as: Money back or replacement (buyer's choice)
  • Returns Accepted: Returns Accepted
  • Brand: Sonnax

    Description

    4L60E 4L65E 4L70E Transmission Sonnax Pinless Forward, 1-2, and 3-4 Accumulator Piston Kit
    Part No.
    77987-01K
    Dual Seal design
    In GM 4L60-E, 4L65-E and 4L70-E units it is common for the plastic forward accumulator piston to wear or crack. This causes a loss of fluid, resulting in delayed engagement, slips, burnt clutches and/or bands. Repeated reciprocation of the accumulator piston causes the piston pin bore to wear, while fluid loss through the piston pin bore or cracks causes forward clutch to slip. Sonnax pinless forward accumulator piston kit 77987-01K eliminates these problems.
    Dual seals stabilize and completely seal the bore, providing a tight seal even after thousands of cycles
    Pinless design eliminates the possibility of pin leakage, and the additional length stabilizes the piston to prevent piston cocking
    Includes steel balls for plugging existing pin bore in valve body
    Contents
    Piston
    D-Ring
    PTFE Seal
    Steel balls (2)
    Specs
    Material: Aluminum
    Part No.
    77998-03K (2PC)
    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
    Contents
    D-Ring
    Viton®
    Pinless Accumulator Piston
    Aluminum
    Seal
    PTFE
    Steel Ball
    .312" dia.
    Steel Ball
    .236" dia.
    Note: In 200-4R applications, this kit can only be used in the 3-4 accumulator location.