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Home >> Subaru >> 2008 >> Outback Base, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 194 (Differential System) >> Rear Differential Front Oil Seal >> Replacement

Rear Differential Front Oil Seal: Replacement

WARNING: This page is about a different car, the 2008 Subaru Impreza. However, it is still accessible from the selected car via links, so may be relevant.
  1. Disconnect the ground cable from the battery.
  2. Shift the select lever or gear shift lever to neutral.
  3. Release the parking brake.
  4. Remove the oil drain plug, and drain gear oil.
    Fig 1: Identifying Drain And Filler Plug
    G05662597Courtesy of SUBARU OF AMERICA, INC.
  5. Install the oil drain plug.
    NOTE: Apply liquid gasket to the drain plug.

    Liquid gasket: 

    THREE BOND 1105 (Part No. 004403010) or equivalent 

    Tightening torque: 

    49 N.m (5.0 kgf-m, 36.2 ft-lb) 

  6. Lift up the vehicle.
  7. Remove the rear exhaust pipe and muffler.
    • Non-turbo model

    <Ref. to REMOVAL , Rear Exhaust Pipe for H4SO engine. > <Ref. to REMOVAL , Muffler for H4SO engine. >

    • Turbo model

    <Ref. to REMOVAL , Rear Exhaust Pipe for H4DOTC engine. > <Ref. to REMOVAL , Muffler for H4DOTC engine. >

  8. Remove the heat shield cover.
    Fig 2: Identifying Heat Shield Cover
    G05661183Courtesy of SUBARU OF AMERICA, INC.
  9. Remove the propeller shaft. <Ref. to REMOVAL , Propeller Shaft . >
  10. Remove the self-locking nut while holding the companion flange with ST.

    ST 498427200 FLANGE WRENCH

    Fig 3: Tightening Self-Locking Nut
    G05032555Courtesy of SUBARU OF AMERICA, INC.
  11. Extract the companion flange using ST.

    ST 399703600 PULLER ASSY

    Fig 4: Extracting Companion Flange
    G05032556Courtesy of SUBARU OF AMERICA, INC.
  12. Remove the oil seal using ST or screwdriver.

    ST 398527700 PULLER ASSY

    Fig 5: Removing Oil Seal
    G05032557Courtesy of SUBARU OF AMERICA, INC.
  13. Install a new oil seal using ST.

    ST 498447120 INSTALLER

    Fig 6: Installing Oil Seal
    G05032558Courtesy of SUBARU OF AMERICA, INC.
  14. Install the companion flange.
    NOTE: Use a plastic hammer to install companion flange.
  15. Tighten the self-locking nut to the specified torque so that rotating resistance of the companion flange becomes the same value as that before replacing the oil seal.

    ST 498427200 FLANGE WRENCH

    NOTE:
    • Use a new self-locking nut.
    • Before installing the self-locking nut, apply seal material to self-locking nut threads.

    SEAL MATERIAL: 

    THREE BOND 1324 (Part No. 004403042) or equivalent 

    Tightening torque: 

    181.5 N.m (18.5 kgf-m, 134.0 ft-lb) 

    Fig 7: Tightening Self-Locking Nut
    G05662603Courtesy of SUBARU OF AMERICA, INC.
  16. Hereafter, reassemble in the reverse order of disassembly.
  17. After installing, fill the differential carrier with gear oil up to the bottom of the filler plug hole. <Ref. to DIFFERENTIAL GEAR OIL . >
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