1979 DATSUN 210 automatic transmission

N

ran
e
Neutral

Torqu
conv

rt
r

011
cool
r
TIC
Oil
pillut

i

RlOr
lubricofion

j

l
oin

vo

Drain
volv
Fron

lub
icati

lJ

x

I

U
2

CD
pr
utl

II

o
or
Automatic
Transmission

e
m

eoo

h
m

Band

ii

@
rvo

Vacuum

Thronl

0
throttl

boclt

up

I
I
olu

Yolv

I

r

Throttl

drain

volv

16

IO

S

X

tJ1
1

g
2nd
3rd

timing

oh

8

r

t

@

I

Not
hlorll
td
X
or

drain

Lin
pru
lr

lGo
rnor

d
pr
ur

60
rnol

pr

m

Torqu
convert
r

Plu
ur

W

TI
I

rottl
p
nur
f

r

1

1

18
I

L
O
lie

chick

volv

3lIf
IDpre
l
h

J
24
m
iM

llv

16
3

X

1X

0

jr

i

II
I

II

I
I

I

X

U4lJ
I

3

J

a
i

I

U1J

S

condory

governor
lal
Primor

gov
rnor
tO

AT457

Fig
AT
II
Oil
Pr
u
Circuit

Diagram
N

rang
Neutral

ATll

DI
RANGE
LOW

GEAR

Po
r
flow

With
the
shift
selector
in
0
low

gear
engine
torque
is

traJWnitted

through
the

applied
rear

clu
tch
to
the

internal

gear
of
the
front

gear
set
The

c1o
kwise
rotation

o
f
the

front
inter

naI

gear
causes
the
front

planet
gears

to
rotate
clockwise

driving
the

com

pound
sun

gear
counterclockwise
The

front

planetary
carrier
is

splined
to
the

output
shaft
This
cau
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

output
shaft
clock

wise
in
a
reduction
ratio

of

approxi

mately
2
46
to
L

Fluid
flow

Manual
Valve

2

3
Automatic
Transmission

Fiont

gear
set
Rear
gear
set

Input
t1uOllsh

rear
clutch

Output
shaft

Held

by
on
way
clutch

Input
from
front

gear
set

Output
to
real

gear
set

AT330

1

J

ld

AT081

Front
clutch

Reu
clutch

Low
and
revcrx
brake

Brake
band
servo

Onto

way
clutch
OFF

ON

OFF

OFF

HOLDING

Fig
AT
12

MochanicaIOp

rationduri

DJ
Ra

Governor
Valve

Pressure
Modifier
Valve
15

2nd
3rd
Shift
Valve

lst
2nd
Shift
Valve

2nd
3rd

Timing
Valve

1st

2nd
Shift
Valve

j
Rear

Clutch

I

Second
Lock
Valve

Second
Lock

Valve

LOrifice

Check

Valve
2nd
3rd

Shift
Valve

AT12

D
ran
Low
r

Oil

pump

l

t

Torque

convlrter

pr
ur

rlgula
Tor

yalvl

t

t

1

L

Line

pr
ur

l

Governor

preslur
Automatic
Transmission

Fr
on1

clutch
Rear

cl
ulch

t

l

Torque
conyert

pressure

Throttle

pr
iur
Brake

ba
n
d

o

h
Band

I
b
rvo

I
Low

0
nd

reven
brQke

t

l

Thralll

pre
ur

t

1V

Governor

pre
sur

AT448

Fig
AT
J3
Oil
Pr
ure
Circuit

Diagrom
D

rang
Low

gear

AT13

0
ren
e
2nd

gear

1
Oil

pump

l
t

ra

d

l

t
Tor

q
UI

convlrt
r

Prlssure

rlQulotor

valvl
Automatic
Transmission

Front

clutch

tt1t

P
RN021
Rear

clutch
Brake

band
LOllii
ond

rlverse
brake

Govern
or

preslure
t

Line

pressure

Governor

pre
ur

j

iiiiB
Torque
canverter
prollure

Throttle

pre
ur

AT448

Fir
AT
15
Oil
Pr
re
Circuit
D
m
D

rang
2nd

g
ar

AT15

Automatic
Transmission

D3
RANGE
3RD

GEAR

Front

gear
set
Rei
r

gear
set

Input
through
flODt

and
rear
clutches
Power
flow

In

D3
range
engine

troque
is

transmitted

through
both
clutches

The

front
clutch
turns
the
internal

gear
of
the
forward

gear
set
clockwise

The

rear
clutch

turns
the

sun

gears
in
a

clockwise
direction
also

With
both
the

internal

gear
and
the
sun

gear
of
the

forward

gear
set

turning
in
the

same

direction
at
the
same

speed
the

planet

gears
are
locked
in

position
and
turn

as
a
unit
The

output
shaft

spIined
to

the
forward

planet
carrier

turns
at
a

ratio
of
L
Output

shaft

AT332

Front
clutch

ON

Ij
1f

Front
clutch

Rear
e1utd

Low
reverse

brake

Brake
band

On

way
clutch
ON

ON

OFF

OFF
Pressure
rdeaJe

OFF
A

T083

Fill
AT
I6
Mechanical

Operation
hiring
D

Ronge

Fluid
flow

Governor

pre
ure
increases
to
the

poinl
that
it

can
overcome
the
com

bined
forces

of

spring
and
throttle

pressure
and
move
the
2nd
3rd
shift
valve
When
the
2nd
3rd
shift
valve

opens

pressure
passes
through
the

valve
lands
to
the
2
3

timing
valve
and

on
to

apply
the
front
clutch
and
release
the
brake
band
The
car
is
now

in

D3
or
direct
drive
the
rear
clutch

was

already

applied

Manual
Valve
I
Governor
Valve
IS
Pressure
Modifier
Valve

2nd
3rd

Timin8
Valve

2nd
3rd
Shift
Valve

ht
2nd
Shift
Valve

1st
2nd
Shift
Valve
8
Second
Lock
Valve

9
Band
Servo

Apply
Side

2
i

I

I

Band
Servo
is
released

t

Second
Lock
Valve

L

Orifice
Check
Valve
2nd
3rd
Shift
Valve
10

r
Band
Servo
Rele

Side

I

L
2nd
3rd

Timing
Valve
I
I

I
Front
Clutch

I
J

Second
Lock
Valve
I
Rear
Clutch

I

3

AT

16

D3
ran

3rd
g
ar

Oi
I

pump

1

t

Torque
J

C
onYlrt
r

I
i

t
t

Pressure

reQula
or

Ya
lye

L
i
ns

pressure

Goyernor

pressure
Automatic
Transmission

Front

clurch
Rlar

clutch
Brake

bond
Low

and

rever
brake

0

thBond
L
B
so

J
1

1

1

lt

r
T

tr
Throttle

pressure

t

t

I

@

t

Governor

pr
au
r

Torque
canYlr
er

pr
ssure

rIA
Throttle

pressure

AT449

Fill
AT
17
Oil

Pro
ure
Circuit

Diagram

D3
range
3rd

gear

AT
17

D
RANGEKICKDOWN

To
achieve
a
forced
downshift
from

3rd
to
2nd
the

car

speed
must
be

under

approximately
100
km
h

60

mph
from
2nd

to
1st
il

must
be

under

approximately
50

km
h
30

mph
Fully
depressing
the
accelerator

pedal
energizes

jhe
dow
hift
sole

noid
which

opem
the

solenoid
down

shift
valve
Oil

pressure
is
then
exerted

against
the
shift
valves
Between
50

and
100
km
h
30
and
60

mph
this

pressure
will

close
the
2nd
3rd
shift

vd
t

go
mor

pressure
and

the
car
downshifts
When
the
car

speed

is
below

50
km
h
30

mph
the

Ist

2nd
shift
valve
will
be
closed
and

the
transmission
will
be
in
Isl

gear
A

car

speed
and

governor
pressure
in

crease
the
shift
valves

automaticaJJy

reopen
Autom
tic
Transmission

AT
18

Automatic
Transmission

D
nnse
klckdown
Shift
valvas
In
2nd
sear
position

Vacuum
control

dlophroem

r

r
X

I

i
jI

2

dl

2

l
s
o

@
i
i

JJ
1
1

I

N1
1

JJ

r
OI

r
J

@

I
J

ju
n

II

r
1
o

N
m

II
lln
pru
r

Gov
nor

Iud

pr
ssurel

1

x
x

S
condary
Primor

90V
nor

val

00
rnor

olv
Low

ond

brok

Brak

bond

2

Oil
cooler
I
r
J
80nd

no

C

a

i
0

J

P
N

R
ar

lubrication

aJ

8
ll

Ill

f
I

f

j
l

l
0
1

1

Throttl

drain

voh

i

Xl

U

II
CD

r

lIU
afor

volv

I

l
r

Go
rnor

pr
IU

Torqu
conv
t
r

pr
lur

TIl
rotll

p
lure

AT458

Fig
AT
18
Oil
Pr
mn
Circuit

Diagram
D

rong
kickdown

hift
va
v
s
in
2nd

gear
position

AT
19
X

Throttl

back

up

vain

F

w

I
P
b
I

1

Orific
18
16

ch
ck
X

val

1
r

@2n
3n
lShift

01

l
l

I