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Home >> Pontiac >> 1992 >> Bonneville V6-3800 3.8L >> Repair and Diagnosis >> Transmission and Drivetrain >> Automatic Transmission/Transaxle >> Testing and Inspection >> Symptom Related Diagnostic Procedures >> 4T60-E Automatic Transaxle >> Incorrect Shift Speed

Incorrect Shift Speed

1. Incorrect tooth count on VSS sensor rotor.

2. Wrong PROM.

3. Wrong final drive ratio or model.

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