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Home >> Subaru >> 2015 >> WRX Limited, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 13 (Manual Transaxle & Differential (TY85) (STI)) >> Front Differential Assembly >> Installation

Front Differential Assembly: Installation

WARNING: This page is about a different variant/trim than selected.
  1. Install the differential assembly to the clutch housing.
  2. Apply oil to the screw threads of the side retainer.
  3. Remove the O-rings on both sides of the side retainer.
  4. Install the differential side retainers to both sides, using the ST.

    ST1 18630AA010 WRENCH COMPL RETAINER

    (RH SIDE)

    ST2 18630AA000 WRENCH ASSY (LH SIDE)

    NOTE: Be careful not to damage the oil seal.
  5. Inspect and adjust the hypoid gear backlash. <Ref. to HYPOID GEAR BACKLASH , INSPECTION, Front Differential Assembly.>
  6. Inspect and adjust the tooth contact. <Ref. to ADJUSTMENT , Drive Pinion Shaft Assembly.>
  7. Mark the mating positions of the left and right side retainers and the clutch housing.
    Fig 1: Identifying Left/Right Side Retainers Mark Mating Position
    G05003503Courtesy of SUBARU OF AMERICA, INC.
  8. Remove the differential side retainers from both sides.
    NOTE: When removing the side retainer, record how many times it was turned to remove.
  9. Install new O-rings to the side retainers on both sides.
  10. Attach the differential side retainers to both sides.
    NOTE: When attaching, turn the side retainer the same number of turns it took to remove, and align the marks.
  11. Install the retainer lock plate.

    Tightening torque: 

    25 N.m (2.5 kgf-m, 18.4 ft-lb) 

    NOTE: Be careful not to confuse the left and right side retainer lock plates.
    Fig 2: Identifying Retainer Lock Plate
    G10269207Courtesy of SUBARU OF AMERICA, INC.
  12. Remove any remaining liquid gasket from the clutch housing and adapter plate.
  13. Apply liquid gasket to the clutch housing.

    Liquid gasket: 

    THREE BOND 1215B or equivalent 

    Fig 3: Identifying Liquid Gasket Applying Area To Clutch Housing
    G05003353Courtesy of SUBARU OF AMERICA, INC.
  14. Install the drive pinion shaft assembly. <Ref. to INSTALLATION , Drive Pinion Shaft Assembly.>
  15. Install the individual gear assemblies all at once. <Ref. to INSTALLATION , Main Shaft Assembly.>
  16. Install the transmission case. <Ref. to INSTALLATION , Transmission Case.>
  17. Install the center differential. <Ref. to INSTALLATION , Center Differential.>
  18. Install the transfer driven gear. <Ref. to INSTALLATION , Transfer Driven Gear.>
  19. Install the extension case. <Ref. to INSTALLATION , Extension Case.>
  20. Install the neutral position switch, back-up light switch and harness. <Ref. to INSTALLATION , Neutral Position Switch.> <Ref. to INSTALLATION , Back-up Light Switch.>
  21. Install the manual transmission assembly to the vehicle. <Ref. to INSTALLATION , Manual Transmission Assembly.>
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