Subaru IMPREZA 2002 Service Manual page 93

REAR DIFFERENTIAL
DIFFERENTIALS
19) Install the rear cover and tighten bolts to spec-
ified torque.
CAUTION:
Securely connect the ground terminal of rear
differential temperature sensor.
Tightening torque:
29 N-m (3.0 kgf-m, 2 1.7 ff-lb)
E: INSPECTION
'-Wash all the disassembled parts clean, and exam-
ine them for wear, damage or other defects. Repair
or replace defective parts as necessary.
1) Crown gear and drive pinion:
If abnormal tooth contact is evident, find out the
cause and adjust to give correct tooth contact at as-
sembly. Replace the gear if excessively worn or in-
capable of adjustment.
If crack, score or seizure is evident, replace as a
set. Slight damage of tooth can be corrected by oil
stone or the like.
2) Side gear and pinion mate gear:
Replace if crack, score or other defects are evi-
dent on tooth surface.
Replace if thrust washer contacting surface is
worn or seized. Slight damage of the surface can
be corrected by oil stone or the like.
3) Bearing:
Replace if seizure, peeling, wear, rust, dragging
during rotation, abnormal noise or other defect is
evident.
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:
If the side gear backlash is not within the specifica-
tion, adjust clearance as specified by selecting side
0.1
-
0.2 mm (0.004
-
0.008 in)
gear thrust washer.
2. CROWN GEAR BACKLASH
1934
Using a dial gauge, check the backlash of the
crown gear.
Crown gear backlash:
If the crown gear backlash is not within the specifi-
cation, adjust the side bearing preload or repair if
necessary.
0.1
-
0.2 mm (0.004
-
0.008 in)
G3M
1047
I
DI-33