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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 54 (Manual Transmission - NV 3500 - Overhaul) >> Repair Instructions >> Front and Rear Housings Cleaning and Inspection

Front and Rear Housings Cleaning and Inspection

WARNING: This page is about a different variant/trim than selected.
  1. Clean the clutch housing and rear case in a suitable solvent. Air dry the clutch housing and rear case.
    Fig 1: View Of Transmission Housing
    GM760933Courtesy of GENERAL MOTORS CORP.
  2. Inspect the rear case extension bushing for wear or damage.
  3. Replace the rear case if the extension bushing is faulty. The bushing is not serviceable.
  4. Clean all sealant material from retainer bolt threads.
  5. Inspect the cases for the following conditions:
    • Cracks
    • Scratches
    • Damaged threads
    • Burrs
    • Nicked mounting surfaces
    • Damaged sealing surfaces
    • Damaged front or rear bearing bores
  6. Inspect the machined mating surfaces for flatness with a straight edge.
    Fig 2: Inspecting Transmission Housing
    GM760939Courtesy of GENERAL MOTORS CORP.
  7. Inspect the bearing races and bores for wear, scratches or grooves.
  8. Inspect for loose or missing dowel pins.
  9. Use a soft stone to dress minor scratches or burrs.
  10. If scratches, grooves or scoring cannot be removed by hand with a soft stone or crocus cloth, replace the component.
  11. Clean up damaged threads with the correct size tap.
  12. Replace a cracked housing.