Subaru Legacy IV (2008 year). Manual - part 738

5AT-76

Reduction Driven Gear

AUTOMATIC TRANSMISSION

E: INSPECTION

Make sure the ball bearing and gear is not de-
formed or damaged.

F: ADJUSTMENT

1) Using the ST, measure the height “A” from the
AT main case mating surface to ball bearing outer
ring contact surface.
ST

499575400

GAUGE

2) Using the ST, measure the depth “B”, which is
from mating surface of extension case to ball bear-
ing outer ring contact surface.
ST

499575400

GAUGE

3) Calculation formula:
Select the ball bearing shim from the table to adjust
clearances within 0.05 — 0.25 mm (0.0020 —
0.0098 in).
When clearances are 0.05 mm (0.0020 in):
T (mm) = B – A + 0.23
[T (in) = B – A + 0.0091]
When clearances are 0.25 mm (0.0098 in):
T (mm) = B – A + 0.03
[T (in) = B – A + 0.0012]
T: Shim clearance
A: Height from the mating surface of the AT main
case to the ball bearing outer ring end surface
B: Depth from mating surface of extension case to
ball bearing outer ring contact surface

A Measured value

B Measured value

AT-03269

ST

A

AT-03270

B

ST

Reduction gear shim

Part No.

Thickness mm (in)

31288AA030

0.2 (0.008)

31288AA050

0.5 (0.020)

31288AA060

0.3 (0.012)

5AT-77

Center Differential Carrier

AUTOMATIC TRANSMISSION

29.Center Differential Carrier

A: REMOVAL

1) Remove the transmission assembly from vehicle
body. <Ref. to 5AT-39, REMOVAL, Automatic
Transmission Assembly.>
2) Remove the rear vehicle speed sensor, and sep-
arate the extension case from transmission case.
<Ref. to 5AT-68, REMOVAL, Extension Case.>
3) Extract the rear drive shaft. <Ref. to 5AT-73, RE-
MOVAL, Rear Drive Shaft.>
4) Pull out the center differential carrier assembly.

5) Pull out the shim(s) from transmission case.

B: INSTALLATION

1) Install the center differential assembly with the
shim(s).

NOTE:
Press-fit it to the bottom of bearing shoulder com-
pletely.

2) Insert the rear drive shaft. <Ref. to 5AT-73, IN-
STALLATION, Rear Drive Shaft.>
3) Join the transmission case and the extension
case, and then install the rear vehicle speed sen-
sor. <Ref. to 5AT-68, INSTALLATION, Extension
Case.>
4) Install the transmission assembly to the vehicle.
<Ref. to 5AT-43, INSTALLATION, Automatic
Transmission Assembly.>

C: DISASSEMBLY

1) Remove the seal ring.

2) Using a press and ST, remove the ball bearing.
ST

498077600

REMOVER

3) Remove the snap ring, and pull out the shaft
from center differential assembly.

AT-01972

AT-01972

(A) Seal ring

(A) Snap ring

(B) Shaft

(A)

AT-02015

AT-00167

AT-01973

(A)

(B)

5AT-78

Center Differential Carrier

AUTOMATIC TRANSMISSION

4) Remove the thrust washers, pinion gears and
washers from center differential assembly.

5) Pull out the intermediate shaft and thrust bear-
ing.

D: ASSEMBLY

1) Install the thrust washer onto intermediate shaft.
2) Install the thrust bearing onto intermediate shaft.
3) Install the pinion gears and washers.
4) Insert the shaft into the center differential as-
sembly.
5) Install the snap ring.
6) Using a press, install a new ball bearing into the
center differential assembly.
ST

498077000

REMOVER

7) Apply vaseline onto the seal ring outer surface
and shaft grooves.
8) Install a new seal ring.

E: INSPECTION

• Check each parts for holes, damages or other
foreign matters.
• Inspect the extension end play, and adjust it to
within the standard value. <Ref. to 5AT-70, AD-
JUSTMENT, Transfer Clutch.>

(A) Pinion gear

(A) Plate

(B) Center differential carrier

AT-00169

(A)

AT-00170

(A)

(B)

ST

5AT-79

Parking Pawl

AUTOMATIC TRANSMISSION

30.Parking Pawl

A: REMOVAL

1) Remove the transmission assembly from vehicle
body. <Ref. to 5AT-39, REMOVAL, Automatic
Transmission Assembly.>
2) Remove the extension case. <Ref. to 5AT-68,
REMOVAL, Extension Case.>
3) Remove the center differential carrier. <Ref. to
5AT-77, REMOVAL, Center Differential Carrier.>
4) Remove the front vehicle speed sensor. <Ref. to
5AT-52, REMOVAL, Front Vehicle Speed Sensor.>
5) Remove the parking support actuator.

6) Remove the parking pawl, parking pawl shaft
and return spring.

B: INSTALLATION

1) Set the transmission to the “N” range.
2) Install the parking pawl, parking pawl shaft and
return spring.

3) Install the parking support actuator.

Tightening torque:

10

r

2 N·m (1.0

r

0.2 kgf-m, 7.4

r

1.5 ft-lb)

AT-03236

AT-03272

AT-03272

AT-03236