Drive Chain, Drive Sprocket, and Driven Sprocket Cleaning and Inspection

WARNING: This page is about a different car, the 2009 GMC Yukon, 2009 Chevrolet Tahoe, 2009 Chevrolet Suburban, and 2009 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.

Fig 1: Drive Chain, Drive Sprocket, and Driven Sprocket Cleaning and Inspection

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. Replace any components if damage is found in this procedure. The sprockets must be replaced as a pair. Clean all components in cleaning solvent and air dry.
1	Transfer Case Front Output Shaft Drive Sprocket Bearing Assembly Tip: Replace the bearings if roughness, brinelling, or pitting is detected. Refer to Front Output Shaft Drive Sprocket Bearing Replacement .
2	Transfer Case Front Output Shaft Drive Sprocket Bearing Bore Tip: If the bearing is removed, inspect for excessive wear, damage, or if the bearing has spun in the bore.
3	Transfer Case Four Wheel Drive Clutch Housing Engagement Teeth Tip: Inspect the engagement teeth for chips or excessive wear.
4	Transfer Case Front Output Shaft Drive Sprocket Tip: Inspect for chipped teeth, excessively worn gear surfaces, and debris embedded in the root of the teeth. Witness marks at the location of the chain is normal.
5	Transfer Case Front Output Shaft Driven Sprocket Tip: Inspect for chipped teeth, excessively worn gear surfaces, and debris embedded in the root of the teeth. Witness marks at the location of the chain is normal.
6	Transfer Case Front Output Shaft Drive Chain Assembly Tip: Inspect for loose link pins, binding or stiff links, debris embedded in the links, or worn teeth surfaces.