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Home >> Subaru >> 2001 >> Outback Base, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 149 (Automatic Trans) >> Front Differential >> Adjustment

Front Differential: Adjustment

WARNING: This page is about a different car, the 2003 Subaru Outback, 2003 Subaru Legacy, and 2003 Subaru Baja. However, it is still accessible from the selected car via links, so may be relevant.
  1. Using ST, screw in the retainer until light contact is felt.
    NOTE: Screw in the RH side slightly deeper than the LH side.
    1. ST 499787000 WRENCH ASSY
    Fig 1: Screwing In Retainer Using ST
    G02876031Courtesy of SUBARU OF AMERICA, INC.
  2. Remove the oil pump housing.
  3. Thoroughly remove the liquid gasket from the case mating surface beforehand.
  4. Install the oil pump housing assembly to the torque converter clutch case, and secure evenly by tightening four bolts.
    NOTE: Use an old gasket or an aluminum washer so as not to damage the mating surface of the housing.
    1. Tightening torque:  41 N.m (4.2 kgf-m, 30.4 ft-lb)
    Fig 2: Installing Oil Pump Housing Assembly
    G02876032Courtesy of SUBARU OF AMERICA, INC.
  5. Rotate the drive pinion several times with ST1 and ST2.
    1. ST1 498937110 HOLDER
    2. ST2 499787700 WRENCH
    Fig 3: Rotating Drive Pinion Several Times
    G02876033Courtesy of SUBARU OF AMERICA, INC.
  6. Tighten the LH retainer until contact is felt while rotating the shaft. Then loosen the RH retainer. Keep tightening the LH retainer and loosening the RH retainer until the pinion shaft can no longer be turned. This is the "zero" state.
    Fig 4: Tightening LH Retainer
    G02876034Courtesy of SUBARU OF AMERICA, INC.
  7. After the "zero" state is established, back off the LH retainer 3 notches and secure it with the lock plate. Then back off the RH retainer and retighten until it stops. Rotate drive pinion a few times. Tighten the RH retainer 1-3/4 notches further. This sets the preload. Finally, secure the retainer with its lock plate.
    Fig 5: Securing Retainer With Lock Plate
    G02876035Courtesy of SUBARU OF AMERICA, INC.
    NOTE: Turning the retainer by one tooth changes the backlash about 0.05 mm (0.0020 in).
    Fig 6: Turning Retainer
    G02876036Courtesy of SUBARU OF AMERICA, INC.
  8. Turn the drive pinion several rotations with ST1 and check to see if the backlash is within the standard value with ST2, ST3, ST4 and ST5.
    1. ST1 499787700 WRENCH
    2. ST2 498247001 MAGNET BASE
    3. ST3 498247100 DIAL GAUGE
    4. ST4 499787500 ADAPTER
    5. ST5 498255400 PLATE
    1. Backlash:  0.13 - 0. 18 mm (0.0051 - 0.0071 in)
    Fig 7: Turning Drive Pinion Several Rotations
    G02876037Courtesy of SUBARU OF AMERICA, INC.
  9. Adjust the tooth contact between front differential and drive shaft. < Ref. to ADJUSTMENT , Drive Pinion Shaft.>
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