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4L60 4L60E 4L65E 4L70 Transmission Sonnax Input Drum Reinforcement Kit 77733-51K

4L60 4L60E 4L65E 4L70 Transmission Sonnax Input Drum Reinforcement Kit 77733-51K

by Sonnax
SKU S74969K
$75.53 - $75.53
$75.53
$75.53 - $75.53
$75.53
Availability:
in stock, ready to be shipped

Delivery time

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

OE Spec or Performance/Custom: Performance/Custom

Other Part Number: Superduty, 4l60E heavy duty, transmission

Items Included: Reinforcement Sleeve, Custom Overrun Piston, Piston Seals

Manufacturer Part Number: 77733-51K

Superseded Part Number: 1500, 2500, transmission parts, transmission HP

Vintage Part: No

Placement on Vehicle: Front

Brand: Sonnax

Type: High Performance Input Drum Kit

Core Charge: no

Interchange Part Number: 7773351K, GM transmission, Heavy duty, HP, Shift

Manufacturer Warranty: 6 Month

Surface Finish: new sleeve and aluminum piston

Country/Region of Manufacture: United States

Universal Fitment: Yes

Performance Part: Yes

4L60, 4L60-E, 4L65-E, 4L70-E Transmission

Input Drum Reinforcement Kit
Part No. 77733-51K

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 drum reinforcement kit 77733-51K includes a custom manufactured overrun piston designed for use only with a stamped steel forward piston, eliminating the need to use aluminum forward pistons.

  • 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-model units
  • Reinforcement Sleeve
  • Overrun Piston Inner Seal
  • Overrun Piston
  • Overrun Piston Outer Seal

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