Subaru Impreza 2003 Service Manual page 1646

AUTOMATIC TRANSMISSION
3) Pull out the straight pin and shaft, and remove
the differential bevel gear, washer, and differential
bevel pinion.
(A) Differential case (RH)
2. SIDE RETAINER
NOTE:
After adjusting the drive pinion backlash and tooth
contact, remove and install the oil seal and O-ring.
1) Remove O-ring.
2) Remove oil seal.
FRONT DIFFERENTIAL
(A)
AT-00218
AT-00219
AT-00220
4AT-114
3) Take out either split pin, remove claw.
ST 398527700 PULLER ASSY
(A) Claw
(B) Split pin
(C) Pin
4) Securely attach two claws to outer race, set ST
to side retainer.
ST 398527700 PULLER ASSY
(A) Shaft
(B) Claw
5) Return removed claw to the original position,
and install pin and split pin.
AT-00221
AT-00222