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Sonnax 77731-01 Rear Planetary Pinion Gear for GM 4L60 4L60-E 4L65-E 4L70-E

Manufacturer

Picture for manufacturer Sonnax

Part Number

77731-01
5 reviews
Sale Price

$19.66

2 left at this price

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Usually delivered within 2 days

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No Hassle Returns

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Live-in-stock inventory

Live-in-stock inventory

Fitment guaranteed

Fitment guaranteed

Product Details

The Sonnax 77731-01 is a premium replacement helical pinion gear designed for rear planetary assemblies in GM 4L60, 4L60-E, 4L65-E, and 4L70-E automatic transmissions. This precision-engineered component provides a reliable solution for restoring worn or damaged OE pinion gears that can lead to planetary failure and transmission performance issues.

Key Features:

  • Constructed from case-hardened alloy steel for superior strength and durability
  • Helical gear design ensures smooth, quiet operation
  • Direct OE replacement for rear planetary pinion gears
  • Precision tolerances for proper fit and long service life
  • Designed to work with matching Sonnax pins and needle rollers

Planetary gear wear is often caused by insufficient lubrication or excessive clearances. The Sonnax 77731-01 pinion gear allows transmission rebuilders to replace only the worn components rather than the entire planetary assembly, making it a cost-effective repair solution. This component is an essential part of any quality 4L60/4L65/4L70 series transmission rebuild.

These guys did a great job tires delivered two days before expected 2nd order from them both orders delivered in just a few days

fast easy product is wonderful

Shipping cost was too high for the length of time it took to be delivered.

Overall experience was good until we had to return the item because it wouldn't work with the seat we had. Problem is that when we tred to get the specs on the item you didn't have any of the measurements available. So I was told that if it didn't work I could retun it. When I did you said it was because I ordered wrong so I would be charged to return it. It was wrong because you didn't have any info on the actual size and the only way to see if it would work was to order it.

Ver satisfied

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