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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 >> Rear Case Half

Rear Case Half

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Inspection Areas On Rear Case Half
    GM805640Courtesy of GENERAL MOTORS CORP.
  1. Clean the rear case half in cleaning solvent and air dry.
  2. Remove the sealer from the case sealing surfaces.
  3. Inspect the case for being broken or cracked.
  4. Replace the case if it is broken or cracked.
  5. Inspect the sealing surfaces (1) for damage.
  6. Repair small scratches or nicks with a soft stone.
  7. Inspect the case threaded bolt holes for damage.
  8. Repair any damaged threads.
  9. Inspect the oil pump retainer (5) for wear or damage.
  10. Replace the oil pump retainer if faulty.
  11. Inspect the front output shaft rear bearing (4) for the following conditions:
    • Roughness
    • Brinelling
    • Pitting
  12. Replace the front output shaft rear bearing if any of the above conditions are found. Refer to Transfer Case Disassemble and Transfer Case Assemble .
  13. Inspect the rear output shaft bearing for the following conditions:
    • Roughness
    • Brinelling
    • Pitting
  14. Inspect the rear output shaft rear bearing for a spun bearing bore.
  15. Replace the case if a bearing has spun.
  16. Inspect the rear output shaft rear bearing retaining ring (2) for being bent or twisted.
  17. Replace a faulty retaining ring.
  18. Inspect the rear output shaft bushing (3) for scoring or wear.
  19. Replace a faulty rear output shaft bushing. Refer to Transfer Case Disassemble and Transfer Case Assemble .