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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 >> Oil Pump Assembly Installation

Oil Pump Assembly Installation

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.

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: Identifying 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. See Special Tools .
  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: Refer to Fastener Notice .
  7. Install the bolt (247).

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

    8. Fig 4: View Of 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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