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Home >> GMC Truck >> 1991 >> S15/T15 2WD P/U L4-151 2.5L >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> 3L30 (180/180C) Automatic Transmission >> Jerking When Starting

Jerking When Starting

1. Low fluid pressure.

2. Wrong modulator valve.

3. Sticking pressure regulator valve.

4. Valve body sealing ball out of place.

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