Subaru IMPREZA 2002 Service Manual page 91

I
REAR DIFFERENTIAL
DIFFERENTIALS
18) If proper tooth contact is not obtained, once
again adjust the drive pinion height changing RH
gear backlash.
Where:
T
=
Thickness of pinion height adjusting shim
To = Thickness of shim temDorarilv inserted
and LH side bearing retainer shims and the hypoid
(">
-
(1) Drive pinion height
STl 398507702 DUMMY SHAFT
N = Reading of thickness gauge (mm)
ST2 398507701 DIFFERENTIAL CARRIER
H =
Figure marked on drive pinion head
GAUGE
H3M13098
T
=
To
+
N
-
(H x 0.01)
-
0.20 (mm)
(2) Hyp6id gear backlash
0.10
-
0.20 mm (0.0039
-
0.0079 in)
Backlash:
)
G3M104i
TOOTH CONTACT PATTERN
Condition
Correct tooth contact
Tooth contact pattern slightly shifted
towards toe under no load rotation.
(When loaded, contact pattern moves
toward heel.)
Face contact
Backlash is too large.
Flank contact
Backlash is too small.
Contact pattern
Heel side
-
G3M0098A
This may cause noise and chipping at
tooth ends.
-
G3M0098B
This may cause noise and stepped wear
on surfaces.
Adjustment
Increase thickness of drive pinion height
adjusting shim in order to bring drive pin-
ion closer to crown gear center.
V
G3M0098F
Reduce thickness of drive pinion height
adjusting shim in order to move drive pin-
ion away from crown gear.
-
G3M0098C G3M0098G
DI-31