Subaru 2009 IMPREZA, Service Manual

Page: 1959 / 3619

4AT-103
Front Differential Assembly
AUTOMATIC TRANSMISSION
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 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.
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.
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 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
Axle shaft
(A) Differential side retainer
AT-00206
ST2
ST1
AT-00229
(A)
(A) Lock plate
AT-00214
(A)
0.05 mm
(0.0020 in)
AT-00230