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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 >> Oil Pump Assembly Installation

Oil Pump Assembly Installation

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.

Tools Required

    Fig 1: Installing J 25025-1
    GM190471Courtesy of GENERAL MOTORS CORP.
  1. Install the J 25025-1  . See Special Tools .
    2. Fig 2: View Of 39855-2
    GM1552969Courtesy of GENERAL MOTORS CORP.
  2. Remove the J 39855-2 which is part of kit J 39855  . See Special Tools .
    3. Fig 3: Drum Thrust Washer
    GM1745043Courtesy of GENERAL MOTORS CORP.
  3. Install the pump to drum thrust washer (601).
  4. Use J 36850  or equivalent to retain the washer to the pump.
  5. For pump assemblies with an ISS hole plug (248), lubricate a NEW O-ring (249) with transmission fluid, and install onto the ISS hole plug (248).
  6. Install the ISS hole plug (248) into the ISS hole and align with the mounting hole.
    7. NOTE: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.
  7. Install the bolt (247).

    Tighten:  Tighten the bolt to 9-11 N.m (6.6-8.1 lb ft).

    8. Fig 4: Pump Cover Case Gasket
    GM1552970Courtesy of GENERAL MOTORS CORP.
  8. Install the pump cover to case gasket (6).
    9. IMPORTANT: The oil pump to case seal is installed after the oil pump assembly, during torque converter installation. Refer to Converter Housing Installation .
  9. Install the oil pump assembly (4) into the case and align all holes properly.
    10. Fig 5: View Of J 25025-1
    GM7503Courtesy of GENERAL MOTORS CORP.
    IMPORTANT: The pump to case bolt O-ring seals (3) must be replaced.
  10. Install the pump to case bolts (2) with new O-ring seals (3).

    Tighten:  Tighten the bolts to 29 N.m (21 lb ft).

  11. Remove the J 25025-1  . See Special Tools .
    12. Fig 6: Locating Pump To Case Bolts & O-Ring Seals
    GM7504Courtesy of GENERAL MOTORS CORP.
  12. Install the remaining pump to case bolts (2) and O-ring seals (3), in the holes where the J 25025-1  were. See Special Tools .

    Tighten:  Tighten the bolts to 29 N.m (21 lb ft).

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