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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 55 (Transfer Case - NVG 263-NP1 - Overhaul) >> Repair Instructions >> Cleaning and Inspection >> High/Low Planetary Carrier

High/Low Planetary Carrier

WARNING: This page is about a different variant/trim than selected.
  1. Clean the high/low planetary carrier in cleaning solvent. Do not disassemble the planetary carrier.
  2. Air dry, and ensure all cleaning solvent is removed from the bearings in the planetary gears (3). Do not spin the planetary gears with compressed air.
  3. Inspect the planetary gears for chipped teeth.
    Fig 1: Identifying Inspection Areas On High/Low Planetary Carrier
    GM886583Courtesy of GENERAL MOTORS CORP.
  4. Inspect the planetary gears for debris embedded in the root of the teeth.
  5. Inspect for a washer (4) being on each side of the planetary gears.
  6. Inspect the low range teeth (1) for damage or excessive wear.
  7. Inspect the thrust washer surface (2) for scoring or excessive wear.
  8. Replace the high/low planetary carrier if any of the above conditions are found.
  9. Inspect the input gear thrust washers for excessive wear or scoring.
  10. Replace the thrust washers if they are faulty.