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GM 4L60 700R4 4L60E Transmission Input Drum Reinforcement Kit Sonnax 77733-02K

GM 4L60 700R4 4L60E Transmission Input Drum Reinforcement Kit Sonnax 77733-02K

by Sonnax
SKU S74969-1K
$24.34 - $24.34
$24.34
$24.34 - $24.34
$24.34
Availability:
in stock, ready to be shipped

Delivery time

You will receive your package in 2–5 business days within the contiguous U.S.

Brand: Sonnax

Type: Drum reinforcement kit

Interchange Part Number: S74969-1K

Manufacturer Warranty: Unspecified Length

Fitment Type: Direct Replacement

Items Included: Reinforcement Sleeve and Overrun Piston inner seal

Manufacturer Part Number: 77733-02K

Surface Finish: New

Drive Type: 4WD,AWD,RWD

Material: Steel

Performance Part: Yes

700R4 4L60 4L60E Transmission

Input Drum Reinforcement Kit
Part No. 77733-02K

fits all 700R4/4L60/E Models 1982-up

The GM 4L60, 4L60-E, 4L65-E and 4L70-E input drum assembly is known to crack where the input shaft is pressed into it (where the overrun clutch rides).

Sonnax offers a hardened steel sleeve that reinforces the input drum to prevent this failure. OE overrun pistons must be machined when using Sonnax input drum reinforcement kit 77733-02K.

  • Sleeve made from hardened chromoly steel
  • Can be installed in early- and late-model units*
  • Sleeve design will not block clutch feed oil
Note *Will not repair a cracked drum. Requires 96-earlier aluminum forward piston or Sonnax billet forward piston 77764-01

Contents:
  • Reinforcement Sleeve
  • Overrun Piston Inner Seal
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