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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 132 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Introduction (2 Of 2)) >> Repair Instructions >> Repair Instructions - Off Vehicle >> Input Housing and Shaft Assembly Inspection

Input Housing and Shaft Assembly Inspection

WARNING: This page is about a different car, the 2007 GMC Yukon XL, 2007 GMC Yukon, 2007 Chevrolet Tahoe, 2007 Chevrolet Suburban, and 2007 Chevrolet Avalanche. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Identifying Input Housing & Shaft Assembly
    GM1552929Courtesy of GENERAL MOTORS CORP.
  1. Inspect the input housing and shaft assembly for the following conditions:
    • Porosity
    • Spline wear - internal and external
    • Input speed sensor models, rotor teeth for cracks or damage
    • Three turbine shaft ball check valves are present and move freely
    • Retainer and ball check valve assembly (620)
    • Orificed cup plug (698)
    • Lube hole cracks
  2. Test the input housing for cracks by tapping housing with wooden handle. Housing should produce a sharp ring.
  3. Inspect the turbine shaft oil seal ring (619) grooves for damage or burrs. The oil seal rings (619) must fit loose into the ring grooves.
    4. Fig 2: Identifying Oil Feed Passages
    GM1552930Courtesy of GENERAL MOTORS CORP.
  4. Inspect the oil feed passages for obstructions.
  5. Apply compressed air into the passages indicated.
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