Subaru 2002 IMPREZA Service Manual page 1988

DIFFERENTIALS
18) 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.
(1) Drive pinion height
ST1 398507702 DUMMY SHAFT
ST2 398507701 DIFFERENTIAL CARRIER
GAUGE
T = To + N − (H x 0.01) − 0.20 (mm)
Where:
T = Thickness of pinion height adjusting shim
(mm)
To = Thickness of shim temporarily inserted
(mm)
N = Reading of thickness gauge (mm)
H = Figure marked on drive pinion head
(2) Hypoid gear backlash
Backlash:
0.10 — 0.20 mm (0.0039 — 0.0079 in)
REAR DIFFERENTIAL FOR T-TYPE
H3M1309B
G3M1047
DI-38
19) Install the rear cover and tighten the bolts to
specified torque.
Tightening torque:
29 N·m (3.0 kgf-m, 21.7 ft-lb)
E: INSPECTION
Wash all the disassembled parts clean, and exam-
ine them for wear, damage, or other defects. Re-
pair 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.
G3M1050