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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 52 (Transfer Case - NVG 149-NP3 - Overhaul) >> Repair Instructions >> Cleaning and Inspection >> Drive Chain and Sprockets

Drive Chain and Sprockets

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  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.