Subaru Impreza 3 / Impreza WRX / Impreza WRX STI. Service manual — part 515
DS-33
Front Drive Shaft
DRIVE SHAFT SYSTEM
2. STI MODEL
NOTE:
Use specified grease.
AAR side:
ONE LUBER C
1) Pass the AAR boot through the shaft.
2) Align alignment marks and install the trunnion on
the shaft. Install the snap ring into the shaft groove
securely.
3) Fill 50 to 60 g (1.76 to 2.12 oz) of specified
grease into the interior of AAR outer race.
4) Apply a thin coat of specified grease to the roller
and trunnion.
5) Place the drive shaft between wooden blocks
and fix it on a vise.
CAUTION:
Do not set the only drive shaft on a vise.
6) Align the alignment marks on the shaft and outer
race.
7) Tap the insertion upper part of the outer race al-
ternately using a plastic or wood bar shown in the
figure, and then insert the roller one by one.
CAUTION:
• Do not use a metal bar as the outer race may
deform.
• Do not tap on the end of outer race (shaft
part).
• Be careful not to deform the baffle plate.
8) Apply an even coat of the specified grease 30 to
40 g (1.06 to 1.41 oz) to the entire inner surface of
boot.
9) Install the AAR boot and grommet taking care
not to twist it.
CAUTION:
• Replace the boot and grommet as a set.
• Do not let grease get on groove of the outer
race side.
10) Insert a flat tip screwdriver, etc. between outer
race and grommet to make pressure inside of boot
as high as barometric pressure.
11) Install the new large boot band and small boot
band at the required positions.
12) Tighten the boot bands using ST, torque
wrench and socket flex handle.
ST 28099AC000 BOOT BAND PLIER
Clearance at the crimped section of the boot
band:
Large boot band
1 mm (0.04 in) or less
Small boot band
1 mm (0.04 in) or less
13) Extend and retract the AAR repeatedly to pro-
vide an equal coating of grease.
DS-00110
DS-00420
(1) Outer race
(2) Grommet
(3) Boot
(A) Large boot band
(B) Boot
(C) Torque wrench
(D) Socket flex handle
(E) AAR
(3)
(2)
(1)
DS-00444
DS-00120
ST
(A)
(B)
(C)
(D)
(E)
ONL
Y
DS-34
Front Drive Shaft
DRIVE SHAFT SYSTEM
E: INSPECTION
Check the removed parts for damage, wear, corro-
sion etc. If faulty, repair or replace.
• PTJ (pillow tripod joint)
Check for seizure, corrosion, damage, wear and
excessive play.
• EBJ (high-efficiency compact ball fixed joint)
Check for seizure, corrosion, damage and exces-
sive play.
• AAR and AC
Check for seizure, corrosion, damage, wear and
excessive play.
• Shaft
Check for excessive bending, twisting, damage
and wear.
• Boot
Check for wear, warping, breakage and scratches.
• Grease
Check for discoloration and fluidity.
DS-35
Rear Drive Shaft
DRIVE SHAFT SYSTEM
8. Rear Drive Shaft
A: REMOVAL
1) Disconnect the ground cable from battery.
2) Lift up the vehicle, and then remove the rear
wheels.
3) Lift the crimped section of axle nut.
4) Remove the axle nut using a socket wrench
while depressing the brake pedal.
CAUTION:
Do not loosen the axle nut while the rear axle is
loaded. Doing so may damage the hub bearing.
5) Drain differential gear oil.
6) Remove the rear trailing link. <Ref. to RS-10,
7) Remove the rear lateral link. <Ref. to RS-16, RE-
8) Remove the rear drive shaft from the rear differ-
ential by using the ST.
ST 28099PA100 DRIVE SHAFT REMOVER
NOTE:
Fit the ST to the bolts as shown in the figure to pre-
vent damage of the side bearing retainer.
9) Remove the rear drive shaft from the rear axle. If
it is hard to remove, use ST1 and ST2.
ST1 926470000
AXLE SHAFT PULLER
ST2 28099PA110
AXLE SHAFT PULLER
PLATE
DS-00038
(A) Bolt
DI-00491
(A)
ST
DS-00122
ST2
ST1
DS-36
Rear Drive Shaft
DRIVE SHAFT SYSTEM
B: INSTALLATION
1) Replace the rear differential side oil seal. <Ref.
to DI-56, REPLACEMENT, Rear Differential Side
Oil Seal.>
NOTE:
After pulling out the drive shaft, be sure to replace
with a new oil seal.
2) Insert the EBJ into rear hub splines.
CAUTION:
• Be careful not to damage the magnetic en-
coder.
• Do not get closer the tool which charged
magnetism to magnetic encoder.
3) Draw the rear drive shaft into specified position.
CAUTION:
Do not hammer drive shaft when installing it.
4) Tighten the axle nut temporarily.
5) Using the ST, install the rear drive shaft to the
rear differential.
ST 28099PA090 OIL SEAL PROTECTOR
6) Attach the links to the rear housing and tighten
them to the specified torque.
CAUTION:
For parts which are not reusable, refer to COM-
PONENT. <Ref. to RS-3, COMPONENT, General
Description.>
Tightening torque:
Stabilizer link
38 N·m (3.87 kgf-m, 28 ft-lb)
Shock absorber
80 N·m (8.16 kgf-m, 59 ft-lb)
Rear lateral link
80 N·m (8.16 kgf-m, 59 ft-lb)
Trailing link
90 N·m (9.18 kgf-m, 66.4 ft-lb)
7) While pressing the brake pedal, tighten the new
axle nuts to the specified torque.
CAUTION:
Do not apply weight to the rear axle before
tightening the axle nut. Doing so may damage
the hub bearing.
Tightening torque:
190 N·m (19.37 kgf-m, 140.1 ft-lb)
8) Lock the axle nut securely.
9) Fill differential gear oil.
10) Install the rear wheels.
Tightening torque:
100 N·m (10.20 kgf-m, 73.8 ft-lb)
11) Connect the battery ground terminal.
12) Inspect the wheel alignment and adjust if nec-
essary.
(1) Magnetic encoder
(2) Rear hub unit bearing
DS-00251
(2)
(1)
ST
DI-00223
DS-00048
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