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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 21 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information And Procedures >> No Drive in Drive Range

No Drive in Drive Range

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No Drive in Drive Range

Checks Causes
Oil Pump (4)
  • Damaged vanes
  • Missing slide spring
  • Oil pump screen assembly plugged or damaged
  • Oil pump rotor guide omitted or misassembled
  • Oil pump rotor cracked or broken
  • Porosity in fluid pump
  • Oil pump surfaces not flat
  • Excessive oil pump rotor clearance
Forward Sprag Clutch Assembly (642)
  • Damaged sprag
  • Worn or pitted inner race
Input (662) and Reaction (681) Carrier Damaged or worn gears
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