Subaru 2004 Impreza Service Manual page 37

MANUAL TRANSMISSION AND DIFFERENTIAL
ST1 498247001 MAGNET BASE
ST2 498247100 DIAL GAUGE
Standard backlash:
0.13 — 0.18 mm (0.0051 — 0.0071 in)
ST2
2. HYPOID GEAR BACKLASH
1) Set the ST1, 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.
ST1 498247001 MAGNET BASE
ST2 498247100 DIAL GAUGE
ST3 498255400 PLATE
2) Install the SUBARU genuine axle shafts to both
side, rotate in the inversion direction so that the
gauge contact with the tooth surface and read the
dial gauge.
Part No. 38415AA100 AXLE SHAFT
Backlash:
0.13 — 0.18 mm (0.0051 — 0.0071 in)
ST3
NOTE:
If the backlash is outside specified range, adjust it
by turning the holder in right side case.
Front Differential Assembly
ST1
MT-00285
ST2
ST1
MT-00293
5MT-106
3. TOOTH CONTACT OF HYPOID GEAR
Check the tooth contact of hypoid gear as follows:
Apply a uniform thin coat of red lead on both tooth
surfaces of 3 or 4 teeth of the hypoid gear. Move
the hypoid gear back and forth by turning the trans-
mission main shaft until a definite contact pattern is
developed on hypoid gear, and judge whether face
contact is correct. If it is inaccurate, make adjust-
ment. <Ref. to 5MT-106, ADJUSTMENT, Front Dif-
ferential Assembly.>
• Tooth contact is correct.
(D)
(A) Toe
(B) Coast side
(C) Heel
(D) Drive side
F: ADJUSTMENT
1. BEVEL PINION GEAR BACKLASH
1) Disassemble the front differential. <Ref. to 5MT-
102, REMOVAL, Front Differential Assembly.>
2) Select a differential washer from the table and
install.
Washer
Part No.
803038021
803038022
803038023
3) Adjust until the specified value is obtained.
Standard backlash:
0.13 — 0.18 mm (0.0051 — 0.0071 in)
(A)
(C) (B)
MT-00294
Thickness mm (in)
0.925 — 0.950
(0.0364 — 0.0374)
0.975 — 1.000
(0.0384 — 0.0394)
1.025 — 1.050
(0.0404 — 0.0413)