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Home >> GMC >> 2006 >> Sierra 1500 HD, 4WD >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 55 (Manual Transmission - NV 4500 - Overhaul) >> Repair Instructions >> Bearings and Spacers Cleaning and Inspection

Bearings and Spacers Cleaning and Inspection

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    NOTE: Do not allow the bearings to spin. Turn them slowly by hand. Spinning the bearings may damage the race and the rollers.
  1. Clean all the bearing parts in a suitable solvent. Air dry all the parts.
  2. Inspect the bearings and journals for roughness and unusual wear or damage.
    Fig 1: Inspecting Bearings & Spacers
    GM38544Courtesy of GENERAL MOTORS CORP.
  3. Inspect the mainshaft bearing journals for wear.
  4. Inspect the mainshaft speed gear bearings for wear.
  5. Inspect the main drive gear pilot bearing rollers for wear.
  6. Replace parts which show signs of excessive wear.
  7. Do not file surfaces which have been hardened and precision ground.
  8. Replace worn or damaged bearings.
  9. Replace mated bearing parts when only one part is damaged.
  10. Lubricate the bearings after inspection. Use Synthetic Manual Transmission Fluid GM P/N 12346190 (Canadian P/N 10953477).