No Fourth Gear, or Slips in Fourth Gear
WARNING: This page is about a different car, the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 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 . |
| Orificed Cup Plug (240) | Not fully pressed into pump cover. Refer to Oil Pump Stator Shaft Bushing Replacement . |