Subaru 2009 IMPREZA Service Manual page 1965

13) Press the center of retaining plate with a force
of N using a push/pull gauge, and measure and
record height "A". Measure at three or more loca-
tions spaced by equal distances and take the aver-
age value.
NOTE:
If measuring in three locations, measure every
120°. If measuring in four locations, measure every
90°.
A
A Measured value
(A) Dish plate
(B) Drive plate
(C) Driven plate
(D) Retaining plate
AT Main Case
14) Installation of the low & reverse brake:
Install the dish plate, driven plate, drive plate and
retaining plate, and then secure them with a snap
ring.
NOTE:
Pay attention to the orientation of the dish plate.
15) Apply compressed air intermittently to check for
operation.
(D)
(B)
(C)
(A)
AT-01721
16) Place same thickness shims on both sides to
prevent plate from tilting, then measure and record
the clearance "B".
NOTE:
Do not push in the shim down with force to a point
where the waves on the drive plate will be crushed.
4AT-109
AUTOMATIC TRANSMISSION
(A) Snap ring
B
B Measured value
( A )
AT-00294
AT-04782
AT-02216