Subaru IMPREZA 2002 Service Manual page 298

FRONT DIFFERENTIAL ASSEMBLY
MANUAL TRANSMISSION AND DIFFERENTIAL
I
E: INSPECTION
Repair or replace the differential gear in the follow-
ing cases:
The hypoid drive gear and drive pinion shaft
tooth surface are damaged, excessively worn, or
seized.
The roller bearing on the drive pinion shaft has a
worn or damaged roller path.
There is damage, wear, or seizure of the differ-
ential bevel pinion, differential bevel gear, washer,
pinion shaft, and straight pin.
The differential case has worn or damaged slid-
ing surfaces.
B3M0558C
(A) Drive pinion shaft
(6) Hypoid driven gear
(C) Pinion shaft
(D) Straight pin
(E) Washer
(F) Differential bevel gear
(G) Differential bevel pinion
(H) Snap ring
(I) Roller bearing
(J) Differential case
1. BEVEL PINION GEAR BACKLASH
Measure the backlash between bevel gear and pin-
ion. If it is not within specifications, install a suitable
washer to adjust it.
NOTE:
Be sure the pinion gear tooth contacts adjacent
gear teeth during measurement.
ST1 498247001 MAGNET BASE
ST2 4982471 00 DIAL GAUGE
Standard backlash:
0.13
-
0.18 mm (0.0051
-
0.0071 in)
2.
HYPOID GEAR BACKLASH
Set the STI, ST2 and ST3. Insert the needle
through transmission oil drain plug hole so that the
needle comes in contact with the tooth surface at a
right angle and check the backlash.
STI 498247001 MAGNET BASE
ST2 4982471 00 DIAL GAUGE
ST3 498255400 PLATE
Backlash:
0.13
-
0.18 mm (0.0051
-
0.0071 in)
NOTE:
If the backlash is outside specified range, adjust it
by turning holder in right side case.
MT-74