2004 SUBARU FORESTER manual transmission

5MT-98
MANUAL TRANSMISSION AND DIFFERENTIAL
Front Differential Assembly
2. SIDE RETAINER
NOTE:
Replace the oil seal and O-ring after adjustment of
drive pinion gear backlash and tooth contact.
1) Remove the O-ring.
2) Remove the oil seal.
NOTE:
 Remove the oil seal using a flat tip screwdriver
 Do not reuse the oil seal. Prepare a new oil seal.
D: ASSEMBLY
1. DIFFERENTIAL CASE ASSEMBLY
1) Install the differential bevel gear and bevel pin-
ion together with washers, and insert pinion shaft.
NOTE:
Face the chamfered side of washer toward gear.2) Measure the backlash between differential bevel
gear and pinion. If it is not within specifications, in-
stall a suitable washer to adjust it. 101, ADJUSTMENT, Front Differential Assembly.>
NOTE:
Be sure the pinion gear tooth contacts adjacent
gear teeth during measurement.
ST1 498247001 MAGNET BASE
ST2 498247100 DIAL GAUGE
Standard backlash:
0.13 — 0.18 mm (0.0051 — 0.0071 in)
3) Align the pinion shaft and differential case at
their holes, and drive the straight pin into holes
from the hypoid driven gear side, using ST.
NOTE:
Lock the straight pin after installing.
ST 899904100 REMOVER
(A) Differential bevel pinion
(B) Differential bevel gear
(C) Pinion shaft
MT-00279
MT-01003
MT-00284
(A) (B)
(C)
(A) Pinion shaft
(B) Differential case
(C) Straight pin
MT-00285
ST1
ST2
MT-00286
(A)
(C)
(B)

5MT-99
MANUAL TRANSMISSION AND DIFFERENTIAL
Front Differential Assembly
4) Install the roller bearing to differential case.
CAUTION:
Do not apply load in excess of 10 kN (1 ton, 1.1
US ton, 1.0 Imp ton).
NOTE:
Be careful because the roller bearing outer races
are used as a set.
ST1 499277100 BUSH 1-2 INSTALLER
ST2 398497701 ADAPTER
5) Install the hypoid driven gear to differential case
using twelve bolts.
Tightening torque:
T: 62 N·m (6.3 kgf-m, 45.6 ft-lb)2. SIDE RETAINER
1) Install a new oil seal.
ST 18675AA000 DIFFERENTIAL OIL SEAL IN-
STALLER
CAUTION:
 When pressing fit the oil seal to side retainer,
tap it to press fit using a plastic hammer.
 Do not use the press.
2) Install a new O-ring.
NOTE:
Do not stretch or damage the O-ring.
(A) Hypoid driven gear
(B) Differential case
MT-00287
ST1
ST2
MT-00288
(B) (A)T
MT-00289
ST
MT-00279

5MT-100
MANUAL TRANSMISSION AND DIFFERENTIAL
Front Differential Assembly
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.
1. DIFFERENTIAL BEVEL PINION GEAR
BACKLASH
Measure the backlash between differential bevel
gear and pinion. If it is not within specifications, in-
stall a suitable washer to adjust it.
NOTE:
Be sure the pinion gear tooth contacts adjacent
gear teeth during measurement.
ST1 498247001 MAGNET BASE
ST2 498247100 DIAL GAUGE
Standard backlash:
0.13 — 0.18 mm (0.0051 — 0.0071 in)
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.
ST1 498247001 MAGNET BASE
ST2 498247100 DIAL GAUGE
ST3 498255400 PLATE
2) Install the axle shaft (SUBARU Genuine Parts)
to both sides, move it clockwise and counter clock-
wise to contact tooth, and then read the value of
dial gauge runout.
Parts No. 38415AA100 AXEL SHAFT
Backlash:
0.13 — 0.18 mm (0.0051 — 0.0071 in)
3) If the backlash is outside specified range, adjust
it by turning the holder in right side case.
(A) Drive pinion shaft
(B) Hypoid driven gear
(C) Pinion shaft
(D) Straight pin
(E) Washer
(F) Differential bevel gear
(G) Differential bevel pinion
(H) Roller bearing
(I) Differential case
MT-00291
(A)
(B)(C)
(E)
(E)
(F)
(F)
(G)
(G)
(D)
(H) (I)
(H)MT-00285
ST1
ST2
MT-00293ST1
ST2ST3

5MT-101
MANUAL TRANSMISSION AND DIFFERENTIAL
Front Differential Assembly
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. ferential Assembly.>
 Tooth contact is correct.
F: ADJUSTMENT
1. BEVEL PINION GEAR BACKLASH
1) Disassemble the front differential. 96, REMOVAL, Front Differential Assembly.>
2) Select a different washer from the table and in-
stall.
3) Adjust until the specified value is obtained.
Standard backlash:
0.13 — 0.18 mm (0.0051 — 0.0071 in)
2. HYPOID GEAR BACKLASH
Adjust backlash by turning the holder in right side
case.
ST 499787000 WRENCH ASSY
NOTE:
Each time holder rotates one tooth, backlash
changes by 0.05 mm (0.0020 in).
3. TOOTH CONTACT OF HYPOID GEAR
1) Adjust until the teeth contact is correct.
2) Check and adjust the teeth contact with following
table.
 Tooth contact
Checking item:Tooth contact pattern is slightly
shifted toward to toe side under no-load
rotation. [When loaded, contact pattern moves
toward heel.]
(A) Toe
(B) Coast side
(C) Heel
(D) Drive side
Washer
Part No. Thickness mm (in)
8030380210.925 — 0.950
(0.0364 — 0.0374)
8030380220.975 — 1.000
(0.0384 — 0.0394)
803038023 1.025 — 1.050
(0.0404 — 0.0413)
MT-00294
(A)
(B) (C)
(D)
(A) Toe side
(B) Heel side
MT-00176
ST
MT-00296
0.05mm(0.0020 in)
AT-00207
(A)
(B)

5MT-102
MANUAL TRANSMISSION AND DIFFERENTIAL
Front Differential Assembly
 Face contact
Checking item: Backlash is too large.
Contact pattern
Corrective action: Reduce thickness of drive pinion
height adjusting shim in order to bring drive pinion
close to crown gear.
 Flank contact
Checking item: Backlash is too small.
Contact pattern
Corrective action: Increase thickness of drive pin-
ion height adjusting shim in order to move drive pin-
ion away from crown gear. Toe contact (Inside end contact)
Checking item: Contact areas is small.
Contact pattern
Corrective action: Increase thickness of drive pin-
ion height adjusting shim in order to bring drive pin-
ion close to crown gear.
 Heel contact (Outside end contact)
Checking item: Contact areas is small.
Contact pattern
Corrective action: Reduce thickness of drive pinion
height adjusting shim in order to move drive pinion
away from crown gear.
AT-00208
AT-00212
AT-00209
AT-00213
AT-00210
AT-00213
AT-00211
AT-00212

5MT-103
MANUAL TRANSMISSION AND DIFFERENTIAL
Speedometer Gear
22.Speedometer Gear
A: REMOVAL
1) Remove the manual transmission assembly
from vehicle. Transmission Assembly.>
2) Remove the back-up light switch and neutral po-
sition switch. es and Harness.>
3) Remove the transfer case with extension case
assembly. Case and Extension Case Assembly.>
4) Remove the transmission case. 62, REMOVAL, Transmission Case.>
5) Remove the vehicle speed sensor. 5MT-46, REMOVAL, Vehicle Speed Sensor.>
6) Remove the outer snap ring and pull out speed-
ometer driven gear. Next, remove the oil seal,
speedometer shaft and washer.
B: INSTALLATION
1) Install the washer and speedometer shaft, and
press fit the new oil seal with ST.
ST 899824100 or 499827000PRESS
2) Install the vehicle speed sensor. 46, INSTALLATION, Vehicle Speed Sensor.>
3) Install the speedometer driven gear and new
snap ring.
4) Install the transmission case. INSTALLATION, Transmission Case.>
5) Install the transfer case with extension case as-
sembly. fer Case and Extension Case Assembly.>
6) Install the back-up light switch and neutral posi-
tion switch. Switches and Harness.>
7) Install the manual transmission assembly to ve-
hicle. Transmission Assembly.>
C: INSPECTION
Check the speedometer gear, oil seal and speed-
ometer shaft for damage. Replace if damaged.
(A) Outer snap ring
(B) Speedometer driven gear
MT-00301
(A)(B)
(A) Outer snap ring
(B) Speedometer driven gear
MT-00301
(A)(B)

5MT-104
MANUAL TRANSMISSION AND DIFFERENTIAL
Reverse Idler Gear
23.Reverse Idler Gear
A: REMOVAL
1) Remove the manual transmission assembly
from vehicle. Transmission Assembly.>
2) Remove the back-up light switch and neutral po-
sition switch. es and Harness.>
3) Remove the transfer case with extension case
assembly. Case and Extension Case Assembly.>
4) Remove the transmission case. 62, REMOVAL, Transmission Case.>
5) Remove the drive pinion shaft assembly. to 5MT-87, REMOVAL, Drive Pinion Shaft Assem-
bly.>
6) Remove the main shaft assembly.
Single-Range model
For Single-Range.>
Dual-Range model
For Dual-Range.>
7) Remove the differential assembly. 96, REMOVAL, Front Differential Assembly.>
8) Remove the shifter forks and rods. 106, REMOVAL, Shifter Fork and Rod.>
9) Pull out the straight pin, and remove the Rev
idler gear shaft, reverse idler gear and washer.
10) Remove the reverse shifter lever.
B: INSTALLATION
1) Install the reverse shifter lever, reverse idler
gear and reverse idler gear shaft, and secure with
straight pin.
NOTE:
Be sure to install the reverse idler shaft from rear
side.
2) Inspect and adjust the clearance between re-
verse idler gear and transmission case wall. to 5MT-104, INSTALLATION, Reverse Idler Gear.>
and Idler Gear.>
3) Install the shifter forks and rods. 106, INSTALLATION, Shifter Fork and Rod.>
4) Install the differential assembly. 96, INSTALLATION, Front Differential Assembly.>
5) Install the main shaft assembly.
Single-Range model
sembly For Single-Range.>
Dual-Range model
sembly For Dual-Range.>
6) Install the drive pinion shaft assembly. 5MT-87, INSTALLATION, Drive Pinion Shaft As-
sembly.>
7) Install the transmission case. INSTALLATION, Transmission Case.>
8) Install the transfer case with extension case as-
sembly. fer Case and Extension Case Assembly.>
9) Install the back-up light switch and neutral posi-
tion switch. Switches and Harness.>
10) Install the manual transmission assembly to ve-
hicle. Transmission Assembly.>
(A) Straight pin
(B) Rev idler gear shaft
(C) Rev idler gear
(D) Washer
MT-00303
(A)(B)
(C)
(D)
(A) Reverse shifter lever
(B) Reverse idler gear
(C) Reverse idler gear shaft
(D) Straight pin
MT-00304
(A)
(B)
(D)
(C)

5MT-105
MANUAL TRANSMISSION AND DIFFERENTIAL
Reverse Idler Gear
C: INSPECTION
1) Move the reverse shifter rod toward the reverse
side. Inspect the clearance between reverse idler
gear and transmission case wall.
If out of specification, select the appropriate re-
verse shifter lever and adjust.
Clearance A:
6.0 — 7.5 mm (0.236 — 0.295 in)
2) After installing a suitable reverse shifter lever,
shift into neutral. Inspect the clearance between re-
verse idler gear and transmission case wall.
If out of specification, select the appropriate washer
and adjust.
Clearance:
0 — 0.5 mm (0 — 0.020 in)
3) Check the reverse idler gear and shaft for dam-
age. Replace if damaged.
D: ADJUSTMENT
1) Select the appropriate reverse shifter lever from
the table below, and adjust until the gap between
the reverse idler gear and transmission case wall is
within specification.
Clearance A:
6.0 — 7.5 mm (0.236 — 0.295 in)
2) Select the appropriate washer from the table be-
low, and adjust until the gap between the reverse
idler gear and transmission case wall is within
specification.
Clearance:
0 — 0.5 mm (0 — 0.020 in)
MT-00305
A
MT-00306
Reverse shifter lever
Part No. Mark Remarks
32820AA070 7 Further from case wall
32820AA080 8 Standard
32820AA090 9 Closer to case wall
Washer
Part No. Thickness mm (in)
803020151 0.4 (0.016)
803020152 1.1 (0.043)
803020153 1.5 (0.059)
803020154 1.9 (0.075)
803020155 2.3 (0.091)
MT-00305
A
MT-00306