High/Low Shift Components Cleaning and Inspection

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.

Fig 1: High/Low Shift Components

Courtesy of GENERAL MOTORS CORP.

Callout	Component Name
Preliminary Procedure Inspect all components or sub-components and perform any repair procedure necessary to fix the damage. If the damage cannot be repaired, replace the component or sub-component as indicated. Clean all components in cleaning solvent and air dry.
1	Transfer Case High/Low Clutch Inner Splines Tip: Inspect the inner splines for excessive looseness on the rear output shaft.
2	Transfer Case High/Low Clutch Teeth Tip: Inspect the engagement teeth for chips or excessive wear.
3	Transfer Case High/Low Shift Fork Collar Tip: Inspect the shift fork collar for wear.
4	Transfer Case High/Low Shift Fork Pads Tip: Inspect the pads for wear.
5	Transfer Case High/Low Shift Fork Tip: Inspect for cracks, broken areas, or other damage. The component must be replaced if damage is found. Refer to High/Low Shift Fork Replacement .
6	Transfer Case Control Actuator Shaft Tip: Inspect the shaft splines for excessive wear. The component must be replaced if damage is found. Refer to High/Low Shift Fork Replacement .
7	Transfer Case Actuator Shaft Gear Splines Tip: Witness marks at the location of the splines is normal.
8	Transfer Case Actuator Shaft Gear Teeth Tip: Inspect for chipped teeth, excessively worn gear surfaces, and debris embedded in the root of the teeth.
9	Transfer Case High/Low Shift Fork Pin Tip: Inspect the pin for wear. The component must be replaced if damage is found. Refer to High/Low Shift Fork Replacement .
10	Transfer Case High/Low Shift Fork Spring Assembly Tip: Inspect the cam lobes for wear or roughness. The component must be replaced if damage is found. Refer to High/Low Shift Fork Replacement .
11	Transfer Case Shift Fork Spring Tip: Inspect the spring for breakage. The component must be replaced if damage if found. Refer to High/Low Shift Fork Replacement .