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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 155 (Automatic Transmission - 6L50/6L80/6L90 - Service, Diagnosis & Troubleshooting) >> No Reverse Gear

No Reverse Gear

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Cadillac Escalade EXT, 2007 Cadillac Escalade ESV, and 2007 Cadillac Escalade. However, it is still accessible from the selected car via links, so may be relevant.
No Reverse Gear

Checks Causes
Control Valve Upper Body Assembly (304)
  • Inspect for worn, damaged, or sticking 3-5 reverse regulator valve (336) and valve spring (326).
  • Inspect for damaged or missing #5 checkball.
Control Valve Lower Body Assembly (307) Inspect for worn, damaged, or sticking clutch select solenoid valve 3 (352) and valve spring (353).