Harsh, Soft, Delayed or Slipping 4-5-6 Shift

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2008 GMC Yukon XL, 2008 GMC Yukon, 2008 Chevrolet Tahoe, 2008 Chevrolet Suburban, and 2008 Cadillac Escalade EXT. However, it is still accessible from the selected car via links, so may be relevant.

Checks	Causes
4-5-6 (with Turbine Shaft) Clutch Assembly (56)	Inspect for damaged or worn clutch plates (433-435). Inspect for damaged piston (439), piston dam (437), dam retaining ring (436), and clutch spring (438). Inspect for improper selective 4-5-6 clutch backing plate retaining ring (431). Inspect for cut, worn, or damaged turbine shaft fluid seal rings (442).