Subaru Legacy IV (2008 year). Manual - part 746

5AT-108

AT Main Case

AUTOMATIC TRANSMISSION

4) Using the ST, measure the depth “D” from the
AT main case mating surface to thrust bearing
transferring surface of front sun gear.
ST

499575400

GAUGE

5) Set the value as “E” which subtract the thickness
of ST (499575400 GAUGE) from the measured val-
ue on step 4).
Calculation: E (mm) = D – 15
[E (in) = D – 0.59]
6) Calculation formula:
Select one thrust bearing from the table to adjust
clearance within 0.25 — 0.55 mm (0.0098 —
0.0217 in).
When clearances are 0.25 mm (0.0098 in):
T (mm) = E – C + 0.03
[T (in) = E – C + 0.0012]
When clearances are 0.55 mm (0.0217 in):
T (mm) = E – C + 0.27
[T (in) = E – C + 0.0106]
T: Thrust bearing thickness
C: Distance from oil pump cover mating surface to
rear end of oil pump cover
E: Depth from mating surface of AT main case to
bearing surface of front sun gear

NOTE:
Calculation formula for “T” above is applied when
measuring with the ST (499575400 GAUGE). In
the calculation without using ST, substitute the
thickness of collar used to calculate the value “E”
on step 5).

D Measured value

Thrust bearing

Part No.

Thickness mm (in)

806548020

3.2 (0.126)

606548030

3.4 (0.134)

806548040

3.6 (0.142)

806548050

3.8 (0.150)

806548060

4.0 (0.157)

806548070

4.2 (0.165)

AT-02014

ST

D

5AT-109

Transmission Control Device

AUTOMATIC TRANSMISSION

36.Transmission Control Device

A: REMOVAL

1) Remove the transmission assembly from vehicle
body. <Ref. to 5AT-39, REMOVAL, Automatic
Transmission Assembly.>
2) Pull out the torque converter assembly. <Ref. to
5AT-67, REMOVAL, Torque Converter Assembly.>
3) Lift up the lever on the rear side of transmission
harness connector, and then disconnect it from the
stay.
4) Disconnect the air breather hose. <Ref. to 5AT-
65, REMOVAL, Air Breather Hose.>
5) Wrap vinyl tape around the nipple attached to
the air breather hose.
6) Remove the pitching stopper bracket.
7) Remove the control valve body assembly. <Ref.
to 5AT-57, REMOVAL, Control Valve Body.>
8) Pull out the straight pin of manual plate.

9) Remove the bolts securing range select lever,
and then remove the select lever, manual plate and
parking rod.

NOTE:
Be careful not to damage the lips of press-fitted oil
seal in the case.

10) Remove the detent spring.

(A) Bolt

(B) Range select lever

(C) Manual plate

(D) Parking rod

AT-00305

AT-00306

AT-00307

5AT-110

Transmission Control Device

AUTOMATIC TRANSMISSION

B: INSTALLATION

1) Install the detent spring to the transmission
case.

Tightening torque:

7 N·m (0.7 kgf-m, 5.2 ft-lb)

2) Insert the range select lever, and tighten the
bolts.

Tightening torque:

6 N·m (0.6 kgf-m, 4.4 ft-lb)

3) Insert the manual plate and parking rod.

4) Insert the spring pin to the manual plate.

5) Install the oil pan and the control valve body as-
sembly. <Ref. to 5AT-58, INSTALLATION, Control
Valve Body.>
6) Install the pitching stopper bracket.

Tightening torque:

41 N·m (4.2 kgf-m, 30.2 ft-lb)

7) Insert the transmission connector to the stay.
8) Install the air breather hose. <Ref. to 5AT-65, IN-
STALLATION, Air Breather Hose.>
9) Install the torque converter assembly. <Ref. to
5AT-67, INSTALLATION, Torque Converter As-
sembly.>
10) Install the transmission assembly to the vehi-
cle. <Ref. to 5AT-43, INSTALLATION, Automatic
Transmission Assembly.>

C: INSPECTION

Make sure the manual lever and detent spring are
not worn or otherwise damaged.

(A) Bolt

(B) Range select lever

(C) Manual plate

(D) Parking rod

AT-00307

AT-00308

AT-00306

AT-00305

5AT(diag)-2

Basic Diagnostic Procedure

AUTOMATIC TRANSMISSION (DIAGNOSTICS)

1. Basic Diagnostic Procedure

A: PROCEDURE

Step

Check

Yes

No

1

CHECK PRE-INSPECTION.
1) Ask the customer when and how the trouble 
occurred using the interview check list. <Ref. to 
5AT(diag)-4, Check List for Interview.>
2) Check the following items which may be 
affecting the AT trouble.
• General inspection <Ref. to 5AT(diag)-5, 
INSPECTION, General Description.>
• Oil leakage
• Stall speed test <Ref. to 5AT-32, Stall Test.>
• Line pressure test <Ref. to 5AT-35, Line Pres-
sure Test.>
• Transfer clutch pressure test <Ref. to 5AT-37, 
Transfer Clutch Pressure Test.>
• Time lag test <Ref. to 5AT-34, Time Lag 
Test.>
• Road test <Ref. to 5AT-31, Road Test.>
• Inhibitor switch <Ref. to 5AT-51, Inhibitor 
Switch.>

Is the item that is thought to 
influence the AT problem work-
ing properly?

Go to step 2.

Repair or replace 
each item.

2

CHECK AT OIL TEMP LIGHT.
After the ignition switch is turned to ON, wait for 
at least 2 seconds.

Does the AT OIL TEMP light 
illuminate?

Go to step 4.

Go to step 3.

3

CHECK AT OIL TEMP LIGHT.
1) Turn the ignition switch to OFF.
2) Check the AT OIL TEMP light. <Ref. to 
5AT(diag)-27, INSPECTION, AT OIL TEMP 
Warning Light Display.>
3) After the ignition switch is turned to ON, wait 
for at least 2 seconds.

Does the AT OIL TEMP light 
blink?

Go to step 4.

Go to step 5.

4

CHECK DTC.
Read the DTC. <Ref. to 5AT(diag)-21, OPERA-
TION, Read Diagnostic Trouble Code (DTC).>

NOTE:
If the communication function of Subaru Select
Monitor cannot be executed normally, check
the communication circuit. <Ref. to 5AT(diag)-
29, COMMUNICATION FOR INITIALIZING IM-
POSSIBLE, Diagnostic Procedure for Subaru
Select Monitor Communication.>

Is DTC displayed?

Go to step 6.

NOTE:
Record all DTC.

Go to step 5.

5

PERFORM GENERAL DIAGNOSTICS.
1) Inspect using “Diagnostic Procedure with-
out Diagnostic Trouble Code (DTC)”. <Ref. to 
5AT(diag)-106, Diagnostic Procedure without 
Diagnostic Trouble Code (DTC).>
2) Perform the Clear Memory Mode. 
3) Perform the Inspection Mode. <Ref. to 
5AT(diag)-22, Inspection Mode.>
4) Display DTC.

Is DTC displayed?

Go to step 6.

Inspect using 
“General Diagnos-
tic Table”. <Ref. to 
5AT(diag)-113, 
General Diagnos-
tic Table.>