Subaru Impreza 2003 Service Manual page 2304

REAR AXLE
DRIVE SHAFT SYSTEM
E: INSPECTION
1) Moving the front tire up and down by hand,
check there is no backlash in bearing, and check
the wheel rotates smoothly.
DS-00061
2) Inspect the lean of axis direction using a dial
gauge. Replace the hub bearing if the load range
exceeds the limitation.
Limit:
Maximum: 0.05mm (0.0020 in)
DS-00062
DS-32