Subaru 2002 IMPREZA Service Manual page 2005

4) Thrust washers of side gear and pinion mate
gear
Replace if seizure, flaw, abnormal wear or other
defect is evident.
5) Oil seal
Replace if deformed or damaged, and at every dis-
assembling.
6) Differential carrier
Replace if the bearing bores are worn or damaged.
7) Differential case
Replace if its sliding surfaces are worn or cracked.
8) Companion flange
Replace if the oil seal lip contacting surfaces have
flaws.
1. SIDE GEAR BACKLASH
Using a dial gauge, check the backlash of the side
gear.
Side gear backlash:
0.05 — 0.15 mm (0.0020 — 0.0059 in)
If the side gear backlash is not within the specifica-
tion, adjust clearance as specified by selecting the
side gear thrust washer.
2. CROWN GEAR BACKLASH
Using a dial gauge, check the backlash of the
crown gear.
Crown gear backlash:
0.10 — 0.15 mm (0.0039 — 0.0059 in)
If the crown gear backlash is not within the specifi-
cation, adjust the side bearing preload or repair if
necessary.
REAR DIFFERENTIAL FOR VA-TYPE
B3M1934
G3M1047
DI-55
3. CROWN GEAR RUNOUT
Using a dial gauge, check the crown gear runout.
Crown gear runout:
Less than 0.05 mm (0.0020 in)
If the crown gear runout exceeds 0.05 mm (0.0020
in), replace the crown gear.
4. TOOTH CONTACT BETWEEN CROWN
GEAR AND DRIVE PINION
Inspect the tooth contact between crown gear and
drive pinion.
<Ref. to DI-46, ASSEMBLY, Rear Differential for
VA-type.>
F: ADJUSTMENT
1. SIDE GEAR BACKLASH
Adjust the side gear backlash.
<Ref. to DI-46, ASSEMBLY, Rear Differential for
VA-type.>
2. CROWN GEAR BACKLASH
Adjust the crown gear backlash.
<Ref. to DI-46, ASSEMBLY, Rear Differential for
VA-type.>
3. TOOTH CONTACT BETWEEN CROWN
GEAR AND DRIVE PINION
Adjust the tooth contact between crown gear and
drive pinion gear.
<Ref. to DI-46, ASSEMBLY, Rear Differential for
VA-type.>
DIFFERENTIALS
S3M0525