Subaru IMPREZA GD 2007 Series Manual page 3304

asieps_tobira_IM_US.book 38 ページ ２０１２年１月１７日 火曜日 午後３時４８分
DIFFERENTIALS
(6) Measure the driven gear to drive pinion
backlash. Set the magnet base on differential
carrier. Align the contact point of dial gauge with
the tooth surface of hypoid driven gear, and
move the hypoid driven gear while securing the
drive pinion. Read the value indicated on dial
gauge.
Backlash:
0.10 — 0.20 mm (0.004 — 0.008 in)
NOTE:
If the backlash exceeds 0.20 mm (0.008 in), reduce
the thickness of shim on the back side of the hypoid
driven gear and increase the thickness of shims on
the teeth side of the hypoid driven gear. If the back-
lash is less than 0.10 mm (0.004 in), increase the
thickness of shim on the back side of the hypoid
driven gear and reduce the thickness of shims on
the teeth side of the hypoid driven gear.
(7) At the same time, measure the total preload
of the drive pinion. Compared with the resis-
tance when differential case is not installed, if
the total preload is not within specification, ad-
just the thickness of side bearing retainer
shims, increasing/reducing both shims by an
even amount at a time.
Total preload:
20.7 — 54.4 N (2.1 — 5.5 kgf, 4.7 — 12.2 lbf)
16) Recheck the driven gear to pinion backlash.
Backlash:
0.10 — 0.20 mm (0.004 — 0.008 in)
Rear Differential
17) Check the driven gear runout on its back sur-
face, and make sure that the pinion and driven gear
rotate smoothly.
Driven gear rear face runout limit:
0.05 mm (0.0020 in) or less
18) Checking and adjusting the tooth contact of
driven gear
(1) Apply an even coat of red lead on both sides
DI-00099
of three or four teeth on the driven gear. Check
the contact pattern after rotating the driven gear
several revolutions back and forth until a defi-
nite contact pattern appears on the driven gear.
(2) If the contact pattern is not correct, readjust
it according to the directions indicated in the
"Contact Pattern".
NOTE:
Be sure to wipe off the red lead completely after the
adjustment is completed.
• Correct tooth contact
Check item: Tooth contact pattern is slightly
shifted toward toe side under no-load rotation.
(When driving, it moves towards the heel side.)
(A) Toe side
(B) Heel side
DI-00099
DI-38
DI-00101
(A)
(B)
MT-01401