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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 153 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Service, Diagnosis & Troubleshooting) >> Inaccurate Shift Points

Inaccurate Shift Points

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
Inaccurate Shift Points

Checks Causes
Oil Pump Assembly (4)
  • Stuck pressure regulator valve
  • Sticking pump slide
Valve Body Assembly (60) Spacer plate or gaskets misassembled, damaged or incorrect
Case (103)
  • Porous or damaged valve body pad
  • 2-4 Servo Assembly
    • 2-4 accumulator porosity
    • Damaged servo piston seals
    • Apply pin damaged or improper length
  • 2-4 Band Assembly
    • Burned
    • Anchor pin not engaged
Throttle Position Sensor
  • Disconnected
  • Damage
Vehicle Speed Sensor (36) or Input Speed Sensor (250)
  • Disconnected
  • Damaged
  • Bolt not tightened
4WD Low Switch
  • Disconnected
  • Damaged