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Home >> Chevrolet >> 2006 >> Silverado 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 660 (Transfer Case - NVG 149-NP3 - Overhaul) >> Repair Instructions >> Cleaning and Inspection >> Drive Chain and Sprockets

Drive Chain and Sprockets

WARNING: This page is about a different car, the 2006 GMC Sierra. However, it is still accessible from the selected car via links, so may be relevant.
  1. Clean the drive chain (1), drive sprocket (3), and driven sprocket (2) in cleaning solvent and air dry.
    Fig 1: Drive Chain and Sprockets
    GM801261Courtesy of GENERAL MOTORS CORP.
  2. Inspect the drive chain (1) for the following conditions:
    • Loose link pins
    • Binding or stiff links
    • Debris embedded in the links
    • Worn teeth surfaces
  3. Replace the chain if any of the above conditions are found.
  4. Inspect the driven sprocket (2) and the drive sprocket (3) for the following conditions:
    • Chipped teeth
    • Excessively worn gear surfaces

      Slight wear marks are normal.

    • Debris embedded in the root of the teeth
  5. Replace the sprocket if any of the above conditions are found. The chain and sprockets may be replaced separately.