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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 >> Front Case Half

Front Case Half

WARNING: This page is about a different variant/trim than selected.
    Fig 1: Identifying Front Case Half Inspection Areas
    GM823245Courtesy of GENERAL MOTORS CORP.
  1. Clean the front case half in cleaning solvent and air dry.
  2. Remove the metal shavings from the case half bolt holes.
    3. NOTE: Refer to Machined Surface Damage Notice .
  3. Remove the sealer from the case sealing surfaces.
  4. Inspect the case for being broken or cracked.
  5. Inspect the front output shaft front bearing bore (5) for the following conditions:
    • Spun bearing
    • Cracks
  6. Replace the front case half if any of the above is found.
  7. Inspect the sealing surfaces (2) for damage.
  8. Repair small scratches or nicks with a soft stone.
  9. Inspect the front case to transmission case mounting surface for damage.
  10. Inspect the case threaded bolt holes (3) for damage.
  11. Repair any damaged threads.
  12. Inspect the transmission to transfer case studs (1) for damage.
  13. Replace any damaged studs. Refer to Transfer Case Disassemble  and Transfer Case Assemble .
  14. Inspect the location pins (4 and 7) for being loose or missing.
  15. Repair or replace any damaged location pins.
  16. Inspect the input shaft bushing (6) for the following conditions:
    • Excessive wear
    • Scoring
  17. Inspect the front output shaft front bearing for the following conditions:
    • Roughness
    • Brinelling
    • Pitting
  18. Replace the bearings if any of the above conditions are found. Refer to Transfer Case Disassemble  and Transfer Case Assemble .
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