Sonnax 77733-51KA, 4L60 / 4L60E / 4L65E / 4L70E Input Housing Overrun Sleeve Kit

$ 106.00

SKU: SX 77733-51KA, PATC-S74569, 45-1, a19 ra b9 Categories: , , Tags: , ,


4L60 / 4L60E / 4L65E / 4L70E Input Housing Overrun Sleeve Kit, Sonnax 77733-51KA. 

The GM 4L60, 4L60-E, 4L65-E and 4L70-E input drum assembly is known to crack and strip out splines where the input shaft is pressed into it (where the overrun piston rides). Sonnax offers a hardened steel sleeve that reinforces the input drum to prevent this failure. Sonnax input housing overrun sleeve kit 77733-51KA includes a custom manufacured overrun piston designed for use only with a stamped steel forward piston, eliminating the need to use aluminum forward pistons. For additional torque capacity, this kit can be used in conjunction with input housing forward sleeve kit 77733-52K.

  • Custom overrun piston works with steel forward piston
  • Chromoly steel sleeve design will not block clutch feed oil
  • Universal design fits both early- and late-style units

  • Overrun Piston
  • Overrun Reinforcement Sleeve
  • Outer Overrun Piston Seal
  • Inner Overrun Piston Seal

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Additional information

Weight 1 lbs
Dimensions 9 × 9 × 5 in