Oil Pump Assembly Installation

Tools Required

• J 25025-1  Dial Indicator Mounting Post. See Special Tools .
• J 39855  Stator Shaft Seal Installer. See Special Tools .

Fig 1: Installing J 25025-1 To Transmission Case
Courtesy of GENERAL MOTORS CORP.
1. Install the J 25025-1.
Fig 2: Identifying J 39855-2
Courtesy of GENERAL MOTORS CORP.
2. Remove the J 39855-2 which is part of kit J 39855  . See Special Tools .
Fig 3: Installing Pump To Drum Thrust Washer
Courtesy 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. Install the oil pump to case seal (5) on the oil pump assembly (4).
Fig 4: Aligning Pump Cover To Case Gasket
Courtesy of GENERAL MOTORS CORP.
6. Install the pump cover to case gasket (6).
7. Install the oil pump assembly (4) into the case and align all holes properly.
Fig 5: Installing Pump To Case Bolts & New O-Ring Seals
Courtesy of GENERAL MOTORS CORP.
NOTE: Refer to Fastener Notice .
IMPORTANT: The pump to case bolt O-ring seals (3) must be replaced.
8. Install the pump to case bolts (2) with new O-ring seals (3).

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

9. Remove the J 25025-1 .
Fig 6: Install Remaining Pump To Case Bolts & O-Ring Seals
Courtesy of GENERAL MOTORS CORP.
10. Install the remaining pump to case bolts (2) and O-ring seals (3), in the holes where the J 25025-1 were.

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