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Sonnax 77733-02K Input Drum Reinforcement Kit for GM Automatic Transmission Assembly - 4L60 4L60-E 4L65-E 4L70-E

Manufacturer

Picture for manufacturer Sonnax

Part Number

77733-02K
7 reviews
Sale Price

$35.71

4 left at this price

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Usually delivered within 2 days

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No Hassle Returns

No Hassle Returns

Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sonnax 77733-02K Input Drum Reinforcement Kit is designed to prevent a common failure in GM 4L60, 4L60-E, 4L65-E, and 4L70-E transmissions where the input drum assembly cracks at the location where the input shaft is pressed into the drum, specifically in the overrun clutch area.

Key Features:

  • Hardened steel reinforcement sleeve prevents input drum cracking and failure
  • Protects the critical overrun piston area from stress and breakage
  • Includes reinforcement sleeve and overrun piston inner seal
  • Designed to strengthen the input shaft press-fit spline area
  • Professional-grade transmission rebuild component from Sonnax

Installation Notes:

  • OE aluminum overrun pistons must be machined when using this kit
  • Requires 1996 or earlier aluminum forward piston or Sonnax billet forward piston
  • Will not repair drums that are already cracked
  • Professional installation and transmission rebuild experience recommended

This input drum reinforcement kit is an essential upgrade for transmission rebuilders working on GM 4L60-series transmissions, particularly in high-performance or heavy-duty applications where input drum failure is a common concern.

Thanks

Happy

The refrigerator was at my home in 3 days!!! Was 300 dollars cheaper than even Amazon and just a quick getting it. Far exceeded my expectations and will absolutely order from them again. It was bought to replace a furrion 10cu ft fridge that gave out after a year and 4 months, very disappointing. The fit was right on the sides but did not have to trim anything to fit it in and the layout of the inside is much better than the furrion. I ordered the mounting brackets and sour patch thru a different company and still have not received them.

Very quickly and easily thank you

good day

I did not receive mounting hardware and had to buy my own. Chatted with customer service and they said they would inform the warehouse. Nothing happened.

Great service

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