Harsh, Soft, Delayed or Slipping 1-2-3-4 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
1-2-3-4 and 3-5-R Clutch Assembly (51)	Inspect for damaged or worn 1-2-3-4 clutch plates (408-410). Inspect for damaged 1-2-3-4 clutch piston (414), piston housing (417), spring (413), and dam assembly (412). Inspect for damaged 1-2-3-4 clutch piston dam retaining ring (411). Inspect for cut, worn, or damaged 1-2-3-4 clutch piston seal (416), inner seal (423), and housing seals (424 and 425). Inspect for improper selective 1-2-3-4 clutch backing plate retaining ring (429). Inspect for damaged 1-2-3-4 clutch backing plate (407). Inspect for worn splines on the backing plate.

Checks

Causes

1-2-3-4 and 3-5-R Clutch Assembly (51)

Inspect for damaged or worn 1-2-3-4 clutch plates (408-410).
Inspect for damaged 1-2-3-4 clutch piston (414), piston housing (417), spring (413), and dam assembly (412).
Inspect for damaged 1-2-3-4 clutch piston dam retaining ring (411).
Inspect for cut, worn, or damaged 1-2-3-4 clutch piston seal (416), inner seal (423), and housing seals (424 and 425).
Inspect for improper selective 1-2-3-4 clutch backing plate retaining ring (429).
Inspect for damaged 1-2-3-4 clutch backing plate (407). Inspect for worn splines on the backing plate.