Subaru Legacy (2005 year). Manual - part 539

4AT-137

AUTOMATIC TRANSMISSION

AT Main Case

2. PLANETARY GEAR AND LOW CLUTCH

1) Apply ATF to D-ring, and then install it to the low
clutch piston.
2) Install the low clutch piston to low clutch drum.

3) Install the spring retainer to low clutch piston.

4) Install the ST to low clutch drum.
ST

498437100

LOW CLUTCH PISTON 
GUIDE

5) Set the cover on piston with a press using ST1
and ST2, and install the snap ring. At this time, be
careful not to fold the cover seal.
ST1

498627100

SEAT

ST2

398673600

COMPRESSOR

ST3

498437100

LOW CLUTCH PISTON 
GUIDE

6) Install the dish plate, driven plate and retaining
plate, and then secure them with snap ring.

7) Check the low clutch for operation.

(1) Remove the one-way clutch. <Ref. to 4AT-
121, REMOVAL, AT Main Case.>
(2) Set the one-way clutch inner race, and apply
compressed air for checking.

8) Check the low clutch clearance.

(1) Place the same thickness of shim on both
sides to prevent pressure plate from tilting.
(2) Check the clearance between retaining
plate and low clutch operation.

(A) Low clutch piston

(B) Low clutch dram

(A) Spring retainer

(B) Low clutch dram

AT-00269

(B)

(A)

AT-00270

(A)

(B)

AT-00271

ST

(A) Snap ring

(B) Low clutch dram

(C) Dish plate

(D) Low clutch piston side

(A) Apply compressed air.

(B) Low clutch dram

AT-00272

ST2

ST3

ST1

AT-02221

(B)

(A)

(C)

(D)

AT-00274

(B)

(A)

4AT-138

AUTOMATIC TRANSMISSION

AT Main Case

Initial specification:

0.7 — 1.1 mm (0.028 — 0.043 in)

Service limit:

1.5 mm (0.059 in)

If the clearance is out of specification, select a
suitable retaining plate to adjust it within specifi-
cation.

9) Install the washer to rear internal gear.

10) Install the rear internal gear.

11) Install the thrust needle bearing in correct di-
rection.

12) Install the washer by aligning protrusion of
washer and hole of rear planetary carrier.

(A) Thickness gauge

(B) Low clutch dram

Retaining plate

Part No.

Thickness mm (in)

31567AB050

3.8 (0.150)

31567AB060

4.0 (0.157)

31567AB070

4.2 (0.165)

31567AB080

4.4 (0.173)

31567AB090

4.6 (0.181)

(A) Rear internal gear

(B) Washer

AT-00283

(A)

(B)

AT-00275

(A)

(B)

(A) Rear internal gear

(B) Low clutch dram

(A) Thrust needle bearing

(B) Low clutch dram

(C) Rear planetary carrier side

(D) Low clutch piston side

(A) Washer

(B) Rear planetary carrier

AT-00276

(B)

(A)

AT-02222

(B)

(D)

(C)

(A)

AT-00278

(A)

(B)

4AT-139

AUTOMATIC TRANSMISSION

AT Main Case

13) Install the rear planetary carrier to low clutch
drum.

14) Install the thrust needle bearing in correct di-
rection.

15) Install the rear sun gear in proper direction.

16) Install the thrust needle bearing in proper direc-
tion.

17) Install the front planetary carrier to low clutch
drum.

18) Install the snap ring to low clutch drum.

(A) Rear planetary carrier

(B) Low clutch dram

(A) Rear sun gear side

(B) Rear planetary carrier side

(A) Rear sun gear

(B) Rear planetary carrier

AT-00262

(B)

(A)

AT-02223

(B)

(A)

AT-00261

(B)

(A)

(A) Thrust needle bearing

(B) Front planetary carrier

(C) Rear sun gear side

(D) Front planetary carrier side

(A) Front planetary carrier

(B) Low clutch dram

(A) Snap ring

(B) Front planetary carrier

AT-00280

(A)

(B)

(C)

(D)

AT-00260

(B)

(A)

AT-00281

(B)

(A)

4AT-140

AUTOMATIC TRANSMISSION

AT Main Case

19) Install the needle bearing, and then secure with
the snap ring.

20) Install the one-way clutch, and then secure with
snap ring.
21) Set the one-way clutch inner race. Make sure
that the clutch locks in the clockwise direction and
rotates in the counterclockwise direction.

3. 2-4 BRAKE

1) Apply ATF to D-ring, and then install it to 2-4
brake piston.
2) Install 2-4 brake piston to 2-4 brake piston re-
tainer.

4. ONE-WAY CLUTCH INNER RACE

1) Install the needle bearing to inner race using ST
and press.
ST

398497701

SEAT

2) Apply vaseline to the groove of inner race and
seal ring.
3) Install two seal rings to one-way clutch inner
race.

5. ONE-WAY CLUTCH OUTER RACE

1) Install the needle bearing, and then secure with
the snap ring.

2) Install the one-way clutch and one-way clutch in-
ner race, and then secure with snap ring.

(A) Needle bearing

(B) Snap ring

(A) Lock

(B) Rotate

(A) 2-4 brake piston

(B) 2-4 brake piston retainer

AT-00268

(B)

(A)

AT-00282

(B)

(A)

AT-00288

( A )

( B )

(A) One-way clutch inner race

(B) Seal ring

(A) Needle bearing

(B) Snap ring

ST

AT-00299

AT-00298

(B)

(A)

AT-00268

(B)

(A)