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Home >> Subaru >> 2012 >> Outback Base, Standard Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 13 (Differentials) >> Rear Differential Front Oil Seal >> Replacement
July 1: So it begins. Don't worry, this is not in the correct legal jurisdiction!

Rear Differential Front Oil Seal: Replacement

WARNING: This page is about a different car, the 2011 Subaru Tribeca. However, it is still accessible from the selected car via links, so may be relevant.
  1. Position the select lever to neutral.
  2. Release the parking brake.
  3. Lift up the vehicle.
  4. Remove the oil drain plug, and drain gear oil.
    Fig 1: Identifying Oil Drain Plug And Drain Gear Oil
    G06343388Courtesy of SUBARU OF AMERICA, INC.
  5. Install the oil drain plug.
    NOTE: Use a new gasket.

    Tightening torque: 

    50 N.m (5.1 kgf-m, 36.9 ft-lb) 

  6. Remove the rear exhaust pipe and muffler. Refer to REMOVAL . Refer to REMOVAL .
  7. Remove the heat shield cover.
    Fig 2: Identifying Heat Shield Cover
    G05032025Courtesy of SUBARU OF AMERICA, INC.
  8. Remove the propeller shaft. Refer to REMOVAL , Propeller Shaft.
  9. Remove the self-locking nut while holding the companion flange with ST.

    ST 498427200 FLANGE WRENCH

    Fig 3: Holding Companion Flange Using Flange Wrench ST 498427200
    G05032555Courtesy of SUBARU OF AMERICA, INC.
  10. Extract the companion flange using ST.

    ST 399703600 PULLER ASSY

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

    ST 398527700 PULLER ASSY

    Fig 5: Identifying Puller Assembly
    G05032557Courtesy of SUBARU OF AMERICA, INC.
  12. Install a new oil seal with ST.

    ST 498447120 INSTALLER

    Fig 6: Installing Oil Seal With Installer ST 498447120
    G05032558Courtesy of SUBARU OF AMERICA, INC.
  13. Install the companion flange.
    NOTE: Use a plastic hammer to install companion flange.
  14. Apply seal material to the drive pinion shaft screw threads and the self-locking nut seat surface.

    Seal material: 

    THREE BOND 1324 (Part No. 004403042) or equivalent 

  15. Tighten the self-locking nut within the specified torque range so that the rotating resistance of companion flange becomes the same as that of before oil seal replacement.

    ST 498427200 FLANGE WRENCH

    NOTE: Use a new self-locking nut.

    Tightening torque: 

    191 N.m (19.5 kgf-m, 140.9 ft-lb) 

    Fig 7: Holding Companion Flange Using Flange Wrench ST 498427200
    G05032555Courtesy of SUBARU OF AMERICA, INC.
  16. Hereafter, reassemble in the reverse order of disassembly.
  17. After installing, fill the differential gear oil up to the bottom of the filler plug hole. Refer to DIFFERENTIAL GEAR OIL .
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