Subaru 2009 IMPREZA Service Manual page 2311

3. HYPOID DRIVEN GEAR RUNOUT ON ITS
BACK SURFACE
Using a dial gauge, check the hypoid driven gear
back surface runout.
Hypoid driven gear back surface runout:
0.05 mm (0.002 in)
If the hypoid driven gear runout exceeds 0.05 mm
(0.002 in), replace the hypoid driven gear.
4. TOOTH CONTACT BETWEEN HYPOID
DRIVEN GEAR AND DRIVE PINION
Inspect the tooth contact between the hypoid driv-
en gear and drive pinion. <Ref. to DI-22, ASSEM-
BLY, Rear Differential.>
5. TOTAL PRELOAD
Using a spring scale, check the total preload.
Total preload:
20.7 — 54.4 N (2.1 — 5.5 kgf, 4.7 — 12.2 lbf)
If the total preload is not within the specification,
adjust the side retainer shim.
Rear Differential
6. COMPANION FLANGE
1) If rust or dirt is attached to the companion flange,
remove them.
2) Set a dial gauge at a companion flange surface
(mating surface of propeller shaft and companion
flange), and then measure the companion flange
runout.
Limit of runout:
0.08 mm (0.003 in)
DI-00101
3) Set the gauge inside of the companion flange,
and measure the runout.
Limit of runout:
0.08 mm (0.003 in)
4) If either runout exceeds the limit, move the
phase of companion flange and drive pinion 90°
each, and find the point where the runout is within
the limit.
5) If the runout exceeds the limit after changing the
phase, replace the companion flange and recheck
the runout.
DI-00117
6) If the runout exceeds the limit after replacing the
companion flange, the drive pinion may be assem-
bled incorrectly or bearing is faulty.
DI-33
DIFFERENTIALS
DI-00360
DI-00361