Sonnax pinion pin 77731-02K is a direct replacement for worn or damaged OE pinion pins in rear planetaries in listed GM transmissions. Hollow design features lube holes to reduce planetary burn-up.
Pinion endplay factory specification of between .008" to .024".
Symptoms:
Cause:
Insufficient lube oil and/or excessive clearances.Correction:
Sonnax offers replacement parts for rebuilding damaged rear planet assemblies and gives rebuilders the option of replacing only the worn components.You must login to post a review.
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