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.
Contains an aluminum sleeve and a replacement piston with a PTFE seal
Drop-in solution requires no machining of the transmission case
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.
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.
Kit Contains:
SONNAX Installation Instructions