Subaru 2009 IMPREZA Service Manual page 1980

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AUTOMATIC TRANSMISSION

5) Using ST1, ST2 and ST3, set the cover on the

piston and press against it, and attach the snap

ring. At this time, be careful not to bend the cover

ST1 498627100

ST2 398673600

ST3 498437100

LOW CLUTCH PISTON

6) Install the dish plate, driven plate, drive plate and

retaining plate, and then secure them with a snap

(A) Snap ring

(B) Low clutch drum

(D) Low clutch piston side

7) Check the low clutch for operation.

(1) Remove the one-way clutch. <Ref. to 4AT-

105, REMOVAL, AT Main Case.>

(2) Set the one-way clutch inner race, and apply

compressed air for checking.

(A) Apply compressed air.

(B) Low clutch drum

AT Main Case

8) Check the low clutch clearance.

(1) Place same thickness shims on both sides

to prevent plate from tilting.

(2) Check the clearance between retaining

plate and low clutch operation.

Initial standard:

0.7 — 1.1 mm (0.028 — 0.043 in)

Limit thickness:

1.6 mm (0.063 in)

(A) Thickness gauge

(B) Low clutch drum

If the clearance exceeds the service limits, re-

place the drive plate, then select and adjust the

retaining plate so that the clearance is within

default standard values.

Retaining plate

9) Install the washer to the rear internal gear.

(A) Rear internal gear

Thickness mm (in)