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Home >> Chevrolet >> 2012 >> Tahoe Base, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1101 (Automatic Transmission - 6L50/6L80/6L90 - Removal & Installation, Service, Overhaul, Troubleshooting & Diagnosis) >> Diagnostic Information And Procedures >> No First Gear

No First Gear

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Checks Causes
Center (with 2-6 Low and Reverse Clutch) Support Assembly (67)
  • Inspect for damaged low clutch sprag assembly (467). Holding the sprag assembly with the retaining ring facing up, and the inner race of the sprag assembly fixed, the outer race should freewheel counterclockwise.
  • Inspect for cut, worn, or damaged low clutch sprag seal (468).