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Home >> GMC >> 2006 >> Sierra 1500 HD, RWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 1156 (Transfer Case - BW 4477) >> Repair Instructions - Off Vehicle >> Transfer Case Cleaning and Inspection >> Clutch Components Cleaning and Inspection

Clutch Components Cleaning and Inspection

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: View Of Clutch Components Cleaning and Inspection
GM1907937Courtesy of GENERAL MOTORS CORP.
Clutch Components Cleaning and Inspection

Callout Component Name

Preliminary Procedures

  1. Inspect all components or sub-components and perform any repair procedure necessary to fix the damage. The clutch pack is only available as an assembly.
  2. Do not clean the clutch fiber plates in solvent. Other components may be cleaned in solvent.
1 Transfer Case Separator Plate, Transfer Case Friction Plate
Tip: 
  • The friction plates are assembled with the lube holes aligned. This provides an unrestricted oil path when assembled.
  • Inspect the plates for worn, scored, or burnt friction material.
2 Transfer Case Pressure Plate, Transfer Case Separator Plate, Transfer Case Friction Plate
Tip:  Inspect the plates for flatness and warping.
3 Transfer Case Clutch Pack Housing and Clutch Hub
Tip:  Inspect the clutch housing and clutch hub for excessive wear or damage. Excessive wear can be identified by steps in the teeth, which prevent the plates from moving freely.
4 Transfer Case Armature
Tip:  Small scratches or wear patterns are allowed on the armature. Deep gouges or raised metal require clutch pack replacement. The armature is assembled in the clutch pack with the rounded edges on the spline teeth towards the pack.