Subaru Legacy 2005 Service Manual page 2943

(6) Measure the hypoid driven gear to drive pin-
ion backlash. Set the magnet base on differen-
tial carrier. Align the contact point of dial gauge
with tooth face of hypoid driven gear, and move
hypoid driven gear while holding drive pinion
still. Read the value indicated on dial gauge. If
the backlash exceeds 0.2 mm (0.08 in), reduce
the thickness of shim on the back face of hypoid
driven gear and increase the thickness of shim
on the tooth face of hypoid driven gear. If the
backlash is less than 0.1 mm (0.004 in), in-
crease the thickness of shim on the back face of
hypoid driven gear and reduce the thickness of
shim on the tooth face of hypoid driven gear.
Backlash:
0.10 — 0.20 mm (0.0039 — 0.0079 in)
(7) At the same time, measure the total preload
of drive pinion. Compared with the resistance
when differential case is not installed, if the total
preload is not within specification, adjust the
thickness of side bearing retainer shims, in-
creasing/reducing by an even amount at a time.
Total preload:
20.7 — 54.4 N (2.1 — 5.5 kgf, 4.7 — 12.2 lbf)
15) Recheck the hypoid driven gear to drive pinion
backlash.
Backlash:
0.10 — 0.20 mm (0.0039 — 0.0079 in)
Rear Differential (T-type)
16) Check the hypoid driven gear runout on its
back surface, and make sure that pinion and hy-
poid driven gear rotates smoothly.
If the hypoid driven gear runout on its back surface
exceed the specification, verify that there is any for-
eign material between hypoid driven gear and dif-
ferential case, and they are not deformed.
Hypoid driven gear runout on its back surface:
0.05 mm (0.0020 in)
17) Checking and adjusting the tooth contact of hy-
poid driven gear
DI-00099
NOTE:
Be sure to wipe off red lead completely after adjust-
ment is completed.
Checking item: Tooth contact pattern is slightly
shifted toward toe side under no-load rotation.
[When loaded, contact pattern moves toward
heel.]
DI-00099
DI-41
(1) Apply an even coat of red lead on both sides
of three or four teeth on the hypoid driven gear.
Check the contact pattern after rotating the hy-
poid driven gear several revolutions back and
forth until a definite contact pattern appears on
the hypoid driven gear.
(2) When the contact pattern is incorrect, read-
just.
• Correct tooth contact
(B)
(A) Toe side
(B) Heel side
DIFFERENTIALS
DI-00101
(A)
AT-00207