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Home >> Subaru >> 2006 >> Outback i, Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Automatic Transmission 4AT >> Front Differential Assembly >> Adjustment

Front Differential Assembly: Adjustment

  1. Using the ST, screw-in the retainer until resistance is felt.

    ST 18630AA010 WRENCH ASSY

    NOTE:
    • Screw-in the RH side slightly deeper than the LH side.
    • ST 499787000 WRENCH ASSY can also be used.
    Fig 1: Identifying Wrench Assembly
    G05002728Courtesy of SUBARU OF AMERICA, INC.
  2. Remove the oil pump housing.
  3. Remove the liquid gasket from the mating surface completely.
  4. Install the oil pump housing assembly to the converter case, and secure them by tightening the four bolts evenly.
    NOTE: Use an old gasket or aluminum washer to prevent damaging the mating surface of the housing.

    Tightening torque: 

    41 N.m (4.2 kgf-m, 30.4 ft-lb) 

    Fig 2: Identifying Mating Surface Of Housing
    G05002696Courtesy of SUBARU OF AMERICA, INC.
  5. Rotate the drive pinion a few times using ST1 and ST2.

    ST1 498937110 HOLDER

    ST2 499787700 WRENCH

    Fig 3: Identifying Drive Pinion Several Times With ST1 And ST2
    G05002697Courtesy of SUBARU OF AMERICA, INC.
  6. Tighten the LH retainer by rotating the shaft until resistance is felt. Then loosen the retainer RH. Keep tightening the retainer LH, and loosening the retainer RH until the pinion shaft no longer be turned. This is the "zero" state.
    Fig 4: Tightening LH Retainer By Rotating Shaft
    G05022007Courtesy of SUBARU OF AMERICA, INC.
  7. After the "zero" state is established, back off the retainer LH 3 notches and secure it with the lock plate. Then back off the retainer RH and retighten until it stops. Rotate the drive pinion 2 or 3 times. Tighten the retainer RH further 1-3/4 notches. This sets the preload. Finally, secure the retainer with its lock plate.
    Fig 5: Identifying Lock Plate
    G05022008Courtesy of SUBARU OF AMERICA, INC.
    NOTE: Turning the retainer by one tooth changes the backlash approx. 0.05 mm (0.0020 in).
    Fig 6: Identifying Retainer Backlash Dimension
    G05002733Courtesy of SUBARU OF AMERICA, INC.
  8. Install the axle shaft to both sides of the front differential section.

    Part No. 38415AA000Axle shaft

  9. Turn the drive pinion several times using ST1, and check to see if the backlash is within the specification using ST2, ST3, ST4 and ST5.

    ST1 499787700 WRENCH

    ST2 498247001 MAGNET BASE

    ST3 498247100 DIAL GAUGE

    ST4 499787500 ADAPTER

    ST5 498255400 PLATE

    Backlash: 

    0.13 - 0.18 mm (0.0051 - 0.0071 in) 

    Fig 7: Identifying ST1, ST2,ST3,ST4 And ST5
    G05002734Courtesy of SUBARU OF AMERICA, INC.
  10. Adjust the teeth contact of the front differential and drive shaft. < Ref. to ADJUSTMENT , Drive Pinion Shaft Assembly. >
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