Drive Chain, Drive Sprocket And Driven Sprocket Cleaning And Inspection

WARNING: This page is about a different car, the 2018 GMC Yukon XL, 2018 GMC Yukon, 2018 Chevrolet Tahoe, and 2018 Chevrolet Suburban. 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 COMPANY

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 Procedure 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 NOTE: 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 NOTE: Inspect the engagement teeth for chips or excessive wear.
4	Transfer Case Front Output Shaft Drive Sprocket NOTE: 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 NOTE: 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 NOTE: Inspect for loose link pins, binding or stiff links, debris embedded in the links or worn teeth surfaces.