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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) >> Inaccurate Shift Points

Inaccurate Shift Points

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Inaccurate Shift Points

Checks Causes
Oil Pump Assembly (4)
  • Stuck pressure regulator valve
  • Sticking pump slide
Valve Body Assembly (60) Spacer plate or gaskets mis-assembled, 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)
  • Disconnected
  • Damaged
  • Bolt not tightened
4WD Low Switch
  • Disconnected
  • Damaged
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