Datsun 1980 200SX Service Manual page 219

Hydraulic Centrol Circuits
AUTOMATIC TRANSM ISSIO
N
D RANGE
LOW GEAR
Power flow
With the shift selector
in D
low
gear
engine torque
is transmitted
through
the
applied
rear
clutch to the
in1ernal
gear
of
the
fron1
gear set
The
clockwise
rotation
of the front
inter
nal
gear
causes
the fron
t planet
gears
to rotate
clockwise
driving the
com
pound
sun
gear counterclockwise The
front
planetary
carrier is
splined 10 the
output shaft This
causes
the
planet
gears to
drive
the
sun gear
instead of
walking around
the
sun
gear
This
counterclockwise
rotation of the
sun
gear causes
the
rear
planet
gears
to
rotate
clockwise With the
one
way
clutch holding
the
rear
planet
carrier
the
rear
planetary
gears turn
the
rear
internal
gear
and
outpu1
shaft clock
wise in
a
reduction
ratio of
approxi
mately 2 4 6
to I
Fluid flow
Manual Valve
Mechanical
Operation during
61
Range
Front
gear
set
Rear
gear
set
Output shaft
Held
by
one
way
clutch
Input
from front
gear set
Output
to
reai
gear
set
A T330
Front clutch
Rear clutch
Lo and
reverse
brake
Brake band
servo
One
way
clutch
OFF
ON
OFF
OFF
HOLDING
AT081
Governor Valve
15
Pressure Modifier Valve
2nd 3rd Shift Valve
Ist 2nd Shift
Valve
Ist 2nd Shift Valve
2nd 3rd
Timing
Valve
J
Rear Clutch
2
3
Second Lock Valve
Second Lock Valve
L
Orifice Check Valve
2nd
3rd
Shift Valve
AT12