35570K - SERVO PISTON AND SLEEVE KIT (T350)

# 35570K

SERVO PISTON AND SLEEVE KIT (T350)

Symptoms:

No engine braking in manual 2nd
Low line pressure in Reverse
Low line pressure in Neutral
Low line pressure in Drive
Delayed engagement

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.

In GM 350 and 350C 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.