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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 16 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Service, Diagnosis & Troubleshooting) >> Harsh Shifts

Harsh Shifts

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Harsh Shifts

Checks Causes
Throttle Position Sensor Open or shorted circuit
Vehicle Speed Sensor (36) 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