Subaru 2009 IMPREZA Service Manual page 1932

AUTOMATIC TRANSMISSION
11) Apply Vaseline to a new seal ring and attach to
the seal ring groove of the rear drive shaft.
NOTE:
While installing the seal ring, not to stretch the seal
ring excessively.
(A) Seal ring
(B) Rear drive shaft
12) Install the transfer clutch assembly while taking
care not to damage the seal ring.
(A)
(B)
(A) Transfer clutch ASSY
(B) Extension case
Transfer Clutch
(B)
(A)
AT-00141
AT-00125
4AT-76
E: INSPECTION
• Inspect the drive plate facing for wear and dam-
age.
• Make sure the snap ring is not worn and the re-
turn spring has no permanent distortion, damage,
or deformation.
• Inspect the D-ring for damage.
• Inspect the extension end play, and adjust it to
within the standard value. <Ref. to 4AT-77, AD-
JUSTMENT, Transfer Clutch.>
1) Check the clearance between the snap ring and
retaining plate.
2) Before measuring clearance, place same thick-
ness shims on both sides to prevent the retaining
plate from tilting.
3) If the clearance exceeds the service limits, re-
place the plate set (drive plate and driven plate),
and select and adjust a retaining plate to be within
the initial standard value.
Initial standard:
0.7 — 1.1 mm (0.028 — 0.043 in)
Limit thickness:
1.6 mm (0.063 in)
Retaining plate
Part No.
31593AA151
31593AA161
31593AA171
31593AA181
4) Check for tight corner braking phenomenon
when the vehicle is moved forward with the steer-
ing fully turned. If tight corner braking occurs, per-
form the following procedures.
(1) With the steering wheel held at fully turned
position, drive the vehicle in "D" range and with
vehicle speed at approx. 5 km/h (3 MPH) in
both clockwise and counterclockwise directions
for approx. ten times each, while repeating ac-
celeration and braking intermittently.
(2) If the tight corner braking phenomenon still
persists, drive the vehicle again in a circle for
several laps.
AT-00142
Thickness mm (in)
3.3 (0.130)
3.7 (0.146)
4.1 (0.161)
4.5 (0.177)