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7-96
GROUP 7-AUTOMATIC TRANSMISSION
TURBINE
IMPELLER
FRONT OIL SEAL
TRANSMISSION
CASE
DISTRIBUTOR
SLEEVE
EXTENSION HOUSING
SEAL
FLYWHEEL
ONE
·
WAY
CLUTCH
FIG. 22 -Typical FMX Transmission
primary sun gear
shaft.
The front clutch is operated by
fluid pressure against the clutch pis-
ton. The piston moves against a disc
spring which acts as a lever to lock
the drive and driven plates together.
When the clutch is applied, the pri-
mary sun gear is locked to and driv-
.
en by the turbine shaft. The piston is
returned to the release position by
the disc spring when the fluid pres-
sure is removed (Fig. 26). A check
ball is installed in the front clutch
piston to permit fluid exhaust, when
the piston is in its released
position.
In
neutral,
the front clutch drum
and steel plates are being driven
while the composition
plates are
stationary. In
reverse,
the clutch is not
applied, since the steel and composi-
tion plates must rotate in opposite
directions
.
Rear Clutch
clutch drive plates are splined to the
front clutch drum and the driven
plates are connected to the rear clutch
drum and secondary sun gear. When
the rear clutch is applied (in the
reverse and third gear ratios) the
secondary sun gear is driven. The pis-
ton is returned to the released position
by the release spring (Fig. 27).
In neutral, the rear clutch composi-
tion plates are being driven while the
steel plates are free
.
In second gear,
the composition plates are driven, but
the steel plates are held stationary. In
first gear, the composition plates are
D 1133-D
driven clockwise at engine speed while
the steel plates are driven counter-
clockwise.
Front Band and Servo
One end of the front band, which
encircles the rear clutch drum, is an-
chored to the transmission case, and
the other end is connected to the front
servo
(Fig.
28).
Fluid pressure moves the front servo
piston against the inner end of the
front servo actuating
lever.
Force is
transmitted through a strut between
the outer end of the lever and the end
of the band to tighten the band around
The rear clutch (Fig.27) is operated
by fluid pressure against the clutch
piston. Movement of the piston com-
presses the release spring and locks
the multiple-disc
clutch.
The rear
ENGINE DISPLACEMENT
BUILD DATE
SHIFT
FIG. 23 -
Identification Tags
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