• Planetary failure
  • Planetary wear


Excess clearance due to worn planetary components.


Rebuild the front planetary using Sonnax batwing washer.

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

Batwing Washer
Part No. 74582-01K

Fits 5-pinion front planetary.

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Sonnax PTFE-coated batwing washer 74582-01K is a direct replacement for worn or damaged OE washers in GM 4L60-E, 4L65-E and 4L70-E transmissions.

  • 74582 01k
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