Subaru 2009 IMPREZA Service Manual page 2144

MANUAL TRANSMISSION AND DIFFERENTIAL
3. TOOTH CONTACT OF HYPOID GEAR
1) Adjust until correct teeth contact is obtained.
2) Check tooth contact, and perform the adjust-
ment as follows.
• Tooth contact
Check item: Tooth contact surface is slightly
shifted toward the toe side under a no-load con-
dition. (When driving, it moves towards the heel
side.)
(A) Toe side
(B) Heel side
• Face contact
Check item: Backlash is too large.
Contact pattern
Corrective action: Tighten the side retainer to move
the driven gear closer to the drive pinion shaft.
Front Differential Assembly
(A)
(B)
MT-01401
AT-00208
MT-01799
5MT-72
• Flank contact
Check item: Backlash is too small.
Contact pattern
Corrective action: Loosen the side retainer to move
the driven gear away from the drive pinion shaft.
• Toe contact (inside contact)
Check item: Teeth contact area is too small.
Contact pattern
Corrective action: Increase the thickness of drive
pinion shim and tighten the side retainer to move
the driven gear closer to the drive pinion shaft ac-
cording to the procedure for bringing drive pinion
shaft away from driven gear.
AT-00209
MT-01800
AT-00210
AT-00213