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Home >> Chevrolet >> 2007 >> Chevy Express G2500, Van Cargo, 6.6 6 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 22 (Transfer Case - BW 4473-NP3) >> Repair Instructions - Off Vehicle >> Cleaning and Inspection >> Drive Chain and Sprockets

Drive Chain and Sprockets

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    Fig 1: Locating Inspection Areas On Drive Chain and Sprockets
    GM823252Courtesy of GENERAL MOTORS CORP.
  1. Clean the drive chain (2), drive sprocket (3), and driven sprocket (1) in cleaning solvent and air dry.
  2. Inspect the drive chain (2) 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 (1) and the drive sprocket (3) for the following conditions:
    • Chipped teeth
    • Excessive worn gear surfaces

      Slight wear marks are normal.

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