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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) >> No Fourth Gear, or Slips in Fourth Gear

No Fourth Gear, or Slips in Fourth Gear

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.
No 4th or Slipping 4th

Checks Causes
Checkball #2, 4, 8 or 12 Valve body checkball in wrong location or an additional checkball is installed. Refer to Control Valve Body Installation in Transmission Unit Repair Manual-4L60-E.
Orificed Cup Plug (240) Not fully pressed into pump cover. Refer to Oil Pump Stator Shaft Bushing Replacement in Transmission Unit Repair Manual-4L60-E.
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