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PART 7-2-
C4 AUTOMATIC TRANSMISSION
7-73
PISTON SEALS
SNAP RING
PISTON
DISC SPRING
FORWARD CLUTCH CYLINDER
FIG. 78 - Forward Clutch Disassembled
FIG. 79 -Removing or Installing
Disc Spring Snap Ring
FIG.
80 - Removing Forward
Clutch Piston
FORWARD CLUTCH
1.
Remove the clutch pressure
plate
retaining snap
ring (Fig. 77).
2. Remove the pressure plate,
and the drive and
driven
clutch
plates from the clutch hub (Fig. 78).
3.
Remove
the disc
spring
re-
taining snap ring
(Fig. 79).
4.
Apply
air
pressure
at
the clutch
piston pressure hole
(Fig. 80),
to
remove the piston
from
the
clutch
hub.
FIG. 81- Checking Forward
Clutch Snap Ring Clearance
RING GEAR
01428-A
FIG. 82 - Forward Clutch Hub
and Ring Gear Disassembled
EXTERNAL SNAP RING
FIG. 83 - Removing or Installing
Sun Gear External Snap Ring
DRIVE PLATES
DRIVEN PLATES
01425-A
5.
Remove
the
clutch
piston
outer
seal and
the
inner seal from
the clutch hub
(Fig. 78).
6.
Install
new clutch piston seals
on the clutch
piston and drum.
Lubricate the
seals with clean trans-
mission fluid.
7.
Install
the clutch piston into
the clutch hub.
Install the steel ring
on the piston. Install
the disc spring
and retaining
snap ring (Fig. 79).
8. Install the lower
pressure plate
with the flat
side up and radius
side
downward.
Install one non-metallic
clutch
plate
and alternately
install the drive
and
driven
plates.
The last plate
installed will be the
top pressure
plate (Fig. 78). Refer
to Specifica-
tion
Section
for the
correct number
of clutch plates
for the applicable
model
transmission.
9.
Install the
pressure plate re-
taining
snap ring (Fig. 77). Make
sure the snap ring
is fully seated in
the ring groove
of the clutch hub.
10.
With
a
feeler
gauge, check
the clearance between
the snap ring
and the pressure
plate (Fig. 81).
Downward
pressure
on the plate
should be used
when making this
check. The clearance
should be
0.025-0.050.
11.
If the clearance
is not within
specifications, selective
snap rings
are available
in
these
thicknesses,
0.050-0.054,
0.064-0.068,
0.078-
0.082
and 0.092-0.096
inch. Insert
the correct
size snap ring and
recheck the
clearance.
FORWARD
CLUTCH HUB
AND RING
GEAR
1.
Remove
the
forward clutch
hub retaining
snap ring (Fig. 82).
2. Remove
the
forward clutch
hub from the ring
gear.
3. Install the forward
clutch hub
in the ring gear. Make
sure the hub
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