Subaru 2002 IMPREZA Service Manual page 1998

DIFFERENTIALS
3) Adjusting drive pinion height
Adjust the drive pinion height with shim installed
between the rear bearing cone and back of pinion
gear.
(1) Install the ST1, ST2 and ST3, as shown in
the figure, and apply specified preload on the
bearings.
Front and rear bearing preload
For new bearing:
12.7 — 32.4 N (1.3 — 3.3 kgf, 2.9 — 7.3 lb)
at companion flange bolt hole
Adjusting preload for front and rear bearings
NOTE:
At this time, install an original pinion height adjust-
ing shim.
ST1 498447150 DUMMY SHAFT
ST2 32285AA000 DUMMY COLLAR
ST3 498505501 DIFFERENTIAL CARRIER
GAUGE
(A) Pinion height adjusting shim
(2) Measure the clearance N between the end
of ST3 and end surface of ST1 by using a thick-
ness gauge.
NOTE:
Make sure there is no clearance between the case
and ST3.
ST1 498447150 DUMMY SHAFT
ST2 498505501 DIFFERENTIAL CARRIER
GAUGE
REAR DIFFERENTIAL FOR VA-TYPE
S3M0518A
H3M1309B
DI-48
(3) Obtain the thickness of pinion height adjust-
ing washer to be inserted from the following for-
mula, and replace the temporarily installed shim
with this one.
NOTE:
Use 1 to 3 shims as required for adjustment.
T = To + N − 0.05 (mm)
where
T = Thickness of pinion height adjusting shim
(mm)
To = Thickness of shim originally installed
(mm)
N = Reading of thickness gauge (mm)
H = Figure marked on drive pinion head
(Example of calculation)
To = 0.15 mm
N = 0.1 mm
T = 0.15 + 0.1 − 0.05 = 0.2 mm
Result: Thickness = 0.2 mm
Therefore use the 32295AA220.
Pinion height adjusting shim
Part No.
32295AA200
32295AA210
32295AA220
32295AA230
32295AA240
32295AA250
4) Install the selected pinion height adjusting shim
on drive pinion, and press the rear bearing cone
into position with ST.
ST 498175500 INSTALLER
Thickness mm (in)
0.150 (0.0059)
0.175 (0.0069)
0.200 (0.0079)
0.225 (0.0089)
0.250 (0.0098)
0.275 (0.0108)
S3M0519A