Diesel Data: Automotive Repair

Home >> Chevy Truck >> 1988 >> S10/T10 Blazer 4WD V6-262 4.3L >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> 3L30 (180/180C) Automatic Transmission >> Downshift Right After Full Throttle Upshift & Closing Throttle

Downshift Right After Full Throttle Upshift & Closing Throttle

1. Detent valve stuck in open position.

2. Detent cable stuck.

3. Clogged or leaking vacuum modulator line.

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