Subaru 2009 IMPREZA, Service Manual

Page: 1980 / 3619

4AT-124
AT Main Case
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
seal.
ST1
498627100 SEAT
ST2 398673600 COMPRESSOR
ST3 498437100 LOW CLUTCH PISTON
GUIDE
6) Install the dish plate, driven plate, drive plate and
retaining plate, and then secure them with a snap
ring.
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.
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)
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.
9) Install the washer to the rear internal gear.
(A) Snap ring
(B) Low clutch drum
(C) Dish plate
(D) Low clutch piston side
(A) Apply compressed air.
(B) Low clutch drum
AT-00272
ST2
ST3
ST1
AT-02221
(B)
(A)
(C)
(D)
AT-00274
(B)
(A)
(A) Thickness gauge
(B) Low clutch drum
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)