Subaru Impreza 2002 Service Manual page 2734

FRONT AXLE
DRIVE SHAFT SYSTEM
E: INSPECTION
1) Moving the front tire up and down by hand,
check that there is no backlash in the bearing, and
check that the wheel rotates smoothly.
S4M0572
2) Inspect the removed parts for wear and damage.
If defective, replace with new ones.
DS-23