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Home >> GMC Truck >> 1989 >> S15/T15 4WD P/U V6-173 2.8L >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> 3L30 (180/180C) Automatic Transmission >> Sudden Starting Only After Engine RPM Increase

Sudden Starting Only After Engine RPM Increase

1. Jammed band servo piston.

2. Low fluid level.

3. Defective oil pump.

4. Missing fluid screen.

5. Valve body sealing ball out of place.

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