Drive Chain, Drive Sprocket, and Driven Sprocket Cleaning and Inspection
WARNING: This page is about a different car, the 2023 GMC Sierra 3500 HD and 2023 GMC Sierra 2500 HD. However, it is still accessible from the selected car via links, so may be relevant.
- 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.
- Inspect the transfer case front output shaft drive sprocket bearing assembly (1). Replace the bearings if roughness, brinelling, or pitting is detected. Front Output Shaft Drive Sprocket Bearing Replacement
- Inspect the Transfer Case Front Output Shaft Drive Sprocket Bearing Bore (2). If the bearing is removed, inspect for excessive wear, damage, or if the bearing has spun in the bore.
- Transfer case front output shaft drive sprocket (3)
- 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.
- Transfer case front output shaft driven sprocket (4)
- 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.
- Inspect the transfer case front output shaft drive chain assembly (5) for loose link pins, binding or stiff links, debris embedded in the links, or worn teeth surfaces.