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Home >> Subaru >> 2015 >> WRX Limited, Automatic CVT Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 15 (Manual Transaxle & Differential (TY75) (W/O STI)) >> Front Differential Assembly >> Assembly >> Differential Case Assembly

Differential Case Assembly

WARNING: This page is about a different variant/trim than selected.
  1. Install the differential bevel gear and differential bevel pinion together with adjusting washer, and insert the pinion shaft.
    NOTE: Face the chamfered side of adjusting washer toward differential bevel gear.
    Fig 1: Installing Differential Case Assembly
    G10268834Courtesy of SUBARU OF AMERICA, INC.
  2. Measure the backlash between the differential bevel gear and differential bevel pinion. Adjust the backlash if not within specified limit. <Ref. to DIFFERENTIAL BEVEL PINION GEAR BACKLASH , INSPECTION, Front Differential Assembly.>
    NOTE: Be sure the differential bevel pinion gear teeth contact adjacent gear teeth during measurement.

    Standard backlash 

    0.13 - 0.18 mm (0.0051 - 0.0071 in) 

    ST1 498247001 MAGNET BASE

    ST2 498247100 DIAL GAUGE

    Fig 2: Measuring Backlash Between Differential Bevel Gear And Differential Bevel Pinion
    G05003114Courtesy of SUBARU OF AMERICA, INC.
  3. Align the pinion shaft pin hole with the differential case pin hole, and drive the straight pin into the holes from the hypoid driven gear side using the ST.
    NOTE: Use a new straight pin. After driving the straight pin, crimp the area around the hole in order to prevent the straight pin from coming out.

    ST 899904100 STRAIGHT PIN REMOVER

    Fig 3: Driving Straight Pin
    G08548760Courtesy of SUBARU OF AMERICA, INC.
  4. Attach the taper roller bearing inner race.
    CAUTION: Do not apply a load in excess of 10 kN (1 ton, 1.1 US ton, 1.0 Imp ton).
    NOTE: Be careful when handling because the taper roller bearing and the outer race are used as a set.

    ST1 499277100 BUSHING 1-2 INSTALLER

    ST2 398497701 ADAPTER

    Fig 4: Attaching Taper Roller Bearing Inner Race
    G05003116Courtesy of SUBARU OF AMERICA, INC.
  5. Install the hypoid driven gear using twelve bolts.

    Tightening torque: 

    T: 62 N.m (6.3 kgf-m, 45.7 ft-lb) 

    Fig 5: Installing Hypoid Driven Gear Using Twelve Bolts
    G10268838Courtesy of SUBARU OF AMERICA, INC.