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Home >> GMC >> 2003 >> Safari Van Cargo, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1588 (Automatic Transmission - 5AT - Service, Diagnosis & Troubleshooting) >> Harsh Shifts

Harsh Shifts

WARNING: This page is about a different car, the 2007 Saturn Vue. However, it is still accessible from the selected car via links, so may be relevant.
Harsh Shifts

Condition Action
DEFINITION: Excessive shock or flares on all upshifts and downshifts
  • 1st clutch, pressure control solenoid inoperative
  • Input speed sensor inoperative
  • Output shaft speed sensor inoperative
  • ATF temperature sensor inoperative
  • CPC valve A inoperative
  • Foreign material in the spacer plate orifice
  • Inspect the MIL indicator for loose connectors.
  • Inspect the valve body gasket of the AT clutch pressure control solenoid and ATF feed pipes for wear and damage.
  • Inspect the CPC valves if the AT clutch pressure control solenoid valve is stuck.
  • Inspect the sensor O-rings.