Subaru 2009 IMPREZA Service Manual page 1959

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5) Rotate the drive pinion a few times using ST1

ST1 498937110

ST2 499787700

6) Tighten the LH differential side retainer by rotat-

ing 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

Front Differential Assembly

AUTOMATIC TRANSMISSION

7) After reaching the "zero" state, loosen the LH dif-

ferential side retainer by 3 notches and secure it

with the lock plate. Then after returning the RH dif-

ferential side retainer, retighten until it stops. Ro-

tate 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 differen-

tial side retainer with the lock plate.

(A) Lock plate

Turning the differential side retainer by one notch

changes the backlash approx. 0.05 mm (0.0020 in).

8) Install the Subaru genuine axle shafts to the right

and left sides of the front differential.

Install the axle shaft to both sides of the front differ-

ential section.

Part No. 38415AA000