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Home >> Hummer >> 2008 >> H3 Adventure, Automatic >> Repair and Diagnosis >> Transmission >> Hydraulic Diagrams >> Automatic Transmission - 4L60-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis >> Diagnostic Information And Procedures >> Harsh Shifts

Harsh Shifts

Harsh Shifts

Checks Causes
Throttle Position Sensor Open or shorted circuit
Vehicle Speed Sensor (36) or Input Speed Sensor (250) Open or shorted circuit
Automatic Transmission Fluid Pressure (TFP) (69)
  • Contamination
  • Damaged seals
Trans Fluid Temperature Sensor (Part of 69) Open or shorted circuit
Engine Coolant Temperature Sensor Open or shorted circuit
Pressure Control Solenoid (377)
  • Damage to electrical terminals
  • Contamination