Subaru 2009 IMPREZA Service Manual page 2297

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8) Tighten the self-locking nut.

Tightening torque:

70 N·m (7.1 kgf-m, 51.6 ft-lb)

9) Attach the ST to rear differential.

ST 28099PA090 OIL SEAL PROTECTOR

10) Insert the spline shaft until the spline portion

comes inside the side oil seal.

11) Remove ST from rear differential.

12) Push the housing to fully insert the DOJ into the

rear differential.

13) Lower the transmission jack.

Rear Differential

14) Installing procedure hereafter is in the reverse

order of removal.

15) After installing, fill the differential carrier with

gear oil up to the bottom of the filler plug hole. <Ref.

to DI-14, Differential Gear Oil.>

16) Inspect the wheel alignment and adjust if nec-

C: DISASSEMBLY

To detect the real cause of trouble, inspect the fol-

lowing items before disassembling.

• Tooth contact and backlash between hypoid

driven gear and drive pinion

• Hypoid driven gear runout on its back surface

• Total preload of drive pinion

1) Set the ST on vise and install the differential as-

sembly to ST.

ST 398217700

2) Remove the oil drain plug and filler plug, and

drain the gear oil.

3) Remove the air breather cap.

• Do not attempt to replace the air breather cap un-

less necessary.

• Whenever the air breather cap is removed, re-

place it with a new part.

4) Remove the bolts, and then remove the rear

(A) Air breather cap

(B) Rear cover

DIFFERENTIALS