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Home >> Hummer >> 2008 >> H2 4D Utility Wagon >> Repair and Diagnosis >> External Pages >> Different car >> Section 19 (Automatic Transmission - 4L60-E/4L65-E/4L70-E - Introduction (2 Of 2)) >> Repair Instructions >> Off-Vehicle Repair Instructions >> Input Housing and Shaft Assembly Inspection

Input Housing and Shaft Assembly Inspection

WARNING: This page is about a different car, the 2007 Hummer H2. However, it is still accessible from the selected car via links, so may be relevant.
    Fig 1: Input Housing And 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: 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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