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In GM TH350 and TH350C units, the intermediate servo bore becomes scored from repeated cycling. The spring side of the piston has line pressure present in R, N, D. Excess leakage at the servo piston results in low line pressure and delayed engagements. During forward speeds, oil loss affects shift quality and reduces clutch life. To salvage cases, install Sonnax intermediate servo sleeve kit 35709-01K.
Symptoms:
Cause:
Case bore wear and oil loss at the intermediate servo.Correction:
Sonnax intermediate servo sleeve kit salvages the case, and eliminates the complaints caused by oil loss.You must login to post a review.
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