Subaru Impreza 2.5 L 2004 Owner's Manual page 44

DIFFERENTIALS
• Flank contact
Checking item: Backlash is too small.
Contact pattern
Corrective action: Reduce thickness of drive pinion
height adjusting shim in order to move drive pinion
away from crown gear.
• Toe contact (Inside end contact)
Checking item: Contact area is small.
Contact pattern
REAR DIFFERENTIAL
Corrective action: Reduce thickness of drive pinion
height adjusting shim in order to move drive pinion
away from crown gear.
AT-00209
• Heel contact (Outside end contact)
Checking item: Contact area is small.
Contact pattern
AT-00213
Corrective action: Increase thickness of drive pin-
ion height adjusting shim in order to bring drive pin-
ion close to crown gear.
AT-00210
24) If proper tooth contact is not obtained, once
again adjust the drive pinion height by changing RH
and LH side bearing retainer shims and the hypoid
gear backlash.
25) Remove the side bearing retainers on right and
left side.
26) Install new O-rings to side bearing retainers on
right and left side.
DI-44
AT-00213
AT-00211
AT-00212