AUTOMATIC TRANSMISSION(4AT) > Front Differential Assembly

ADJUSTMENT

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

ST    18630AA010 WRENCH COMPL RETAINER

NOTE:

Screw-in the RH side slightly deeper than the LH side.

ST      WRENCH ASSY (499787000) can also be used.

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, 30.2 ft-lb)

5. Rotate the drive pinion a few times using ST1 and ST2.

ST1    498937110 HOLDER
ST2    499787700 WRENCH

6. Tighten the LH differential side retainer by rotating the shaft until resistance is felt. Then loosen the RH side differential side retainer. Tighten the LH differential side retainer until the pinion shaft no longer turns, and continue to loosen the RH side. This is the “zero” state.

(A)

Differential side retainer

7. After reaching the “zero” state, loosen the LH differential side retainer by 3 notches and secure it with the lock plate. Then after returning the RH differential side retainer, retighten until it stops. Rotate the drive pinion 2 or 3 times. Tighten the RH differential side retainer further by 1-3/4 notches. This sets the preload. Finally, secure the differential side retainer with the lock plate.

(A)

Lock plate

NOTE:

Turning the differential side retainer by one notch changes the backlash approx. 0.05 mm (0.0020 in).

8. Install the SUBARU genuine axle shaft to the left and right sides of the front differential.

Part No. 38415AA000 AXLE SHAFT

9. Turn the drive pinion a few times with ST1 and check to see if the backlash is within the specified value, 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)

10. Adjust the teeth contact of the front differential and drive pinion shaft.