Subaru Legacy IV (2008 year). Manual - part 677

4AT-56

Control Valve Body

AUTOMATIC TRANSMISSION

18.Control Valve Body

A: REMOVAL

1) Set the vehicle on a lift.
2) Disconnect the ground cable from battery.
3) Lift up the vehicle.
4) Clean the transmission exterior.
5) Remove the drain plug (ATF) to drain the ATF.

CAUTION:
After running the engine or after idling for a
long time, the ATF is hot. Be careful not to burn
yourself.

6) Perform replacement with a new gasket, and
tighten the drain plug (ATF).

Tightening torque:

25 N·m (2.5 kgf-m, 18.4 ft-lb)

7) Remove the oil pan.

CAUTION:
Be careful not to allow foreign matter such as
dust or dirt to enter the oil pan.

8) Remove the magnet.

9) Clean the magnet.

10) Completely remove the remaining liquid gasket
on the transmission case and oil pan.
11) Disconnect the control valve connector.

12) Remove the oil cooler pipe.

13) Remove the control valve body.

NOTE:
The control valve body is replaced as an assembly
only, because it is a non-disassembly part.

AT-02928

AT-02929

AT-02743

AT-04838

AT-00059

AT-04833

4AT-57

Control Valve Body

AUTOMATIC TRANSMISSION

B: INSTALLATION

1) Check the control valve body for dust and other
foreign matter.
2) Temporarily attach the control valve body to the
transmission.
3) Install the oil cooler pipe.

Tightening torque:

8 N·m (0.8 kgf-m, 5.9 ft-lb)

4) Tighten the bolts equally.

Tightening torque:

8 N·m (0.8 kgf-m, 5.9 ft-lb)

5) Connect the control valve connector.

6) Attach the magnet at the specified position of the
oil pan.

7) Apply proper amount of liquid gasket to the en-
tire oil pan mating surface.

Liquid gasket:

THREE BOND 1217B (Part No. K0877YA020) 
or equivalent

8) Fill the 3 holes aside from the bolt holes in the
transmission case, with liquid gasket.

Liquid gasket:

THREE BOND 1217B (Part No. K0877YA020) 
or equivalent

9) Install the oil pan by equally tightening the bolts.

Tightening torque:

5 N·m (0.5 kgf-m, 3.7 ft-lb)

10) Fill ATF from the oil charge pipe. <Ref. to 4AT-
26, Automatic Transmission Fluid.>
11) Bleed the air of control valve body. <Ref. to
4AT-59, Air Bleeding of Control Valve.>
12) Check the ATF level. <Ref. to 4AT-26, IN-
SPECTION, Automatic Transmission Fluid.>

(A) Transmission ground

 

Bolt length mm (in)

(1) 35 (1.38)

(2) 30 (1.18)

AT-00059

AT-04839

(A)

(1)

(1)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

(2)

AT-04838

AT-02743

AT-02742

AT-04837

4AT-58

Control Valve Body

AUTOMATIC TRANSMISSION

13) Execute the learning control promotion. <Ref.
to 4AT(diag)-18, FACILITATION OF LEARNING
CONTROL, OPERATION, Subaru Select Moni-
tor.>

C: INSPECTION

Check parts for holes, damages or adhesion of
dust and other foreign particles.

4AT-59

Air Bleeding of Control Valve

AUTOMATIC TRANSMISSION

19.Air Bleeding of Control Valve

A: GENERAL DESCRIPTION

• When ATF is drained from the automatic trans-
mission, make sure to bleed air from the control
valve after filling with the specified amount of ATF.
• Perform the procedures according to the mes-
sage displayed on the Subaru Select Monitor.

B: PROCEDURE

1. PREPARATION FOR AIR BLEEDING

1) Cool down until the ATF temperature displayed
on the Subaru Select Monitor is 60°C (140°F) or
less.
2) Move the select lever to “P” range.
3) Fully apply the parking brake.
4) Lift up the vehicle.

CAUTION:
While working, be sure to keep the lower edge
of the tires 30 cm or more above the ground as
vehicle will vibrate.
5) Connect the Subaru Select Monitor to data link
connector.
6) Turn the ignition switch to ON.
7) Turn off all switches causing an electrical load,
such as headlights, A/C, seat heater and rear de-
fogger.