Subaru Impreza 2003 Service Manual page 2250

DIFFERENTIALS
14) Install the companion flange.
NOTE:
Use a plastic hammer to install the companion
flange.
15) Tighten the self-locking nut within the specified
torque range so that the preload of companion
flange becomes the same as that before replacing
oil seal.
ST 498427200 FLANGE WRENCH
NOTE:
Use a new self-locking nut.
Tightening torque:
T-type:
181 N·m (18.5 kgf-m, 134 ft-lb)
VA-type:
191 N·m (19.5 kgf-m, 141 ft-lb)
ST
16) Hereafter, reassemble in the reverse order of
disassembly.
REAR DIFFERENTIAL FRONT OIL SEAL
DI-00199
DI-70