High/Low Shift Components Cleaning and Inspection

WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. 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 Inserts Tip: Inspect the inserts 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.
6	Transfer Case Control Actuator Shaft Tip: Inspect the shaft for straightness.
7	Transfer Case Shift Fork Spring Tip: Inspect the spring for breakage.
8	Transfer Case High/Low Shift Fork Pin Tip: Inspect the pin for wear.
9	Transfer Case Two/Four Wheel Drive Mode Cam Lobes Tip: Inspect the cam lobes for wear or roughness.
10	Transfer Case Shift Detent Plunger Cam Lobes Tip: Inspect the cam lobes for wear or roughness.
11	Transfer Case Shift Detent Lever Shaft Tip: Inspect for scoring, brinelling, pitting, or excessive wear.
12	Transfer Case High/Low Shift Fork Cam Lobes Tip: Inspect the cam lobes for wear or roughness.