1979 DATSUN 210 Service Manual

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

D2

RA
NGE
2ND
GEAR

Power
flow

In

02
range
the

brake
band
is

applied
to

hold
the

connecting
shell

and
sun

gear
stationary
Engine

torque
through
the

applied
rear
clutch

is
delivered

to
t
he
int

D
1l

1
gear
of
the

front

gear
set
in
a

clockwise
rotation

Clockwise
rotation
of
the
internal

gear

causes
the

planet
gears
to
walk

around
the

stationary
sun

gear
in

a

clockwise
direction
This
causes
the

output
shaft
which
is

splined
to
the

front

planet
carrier

to
turn
ina
clock

wise

direction
with

a
reduction
ratio

of
about
I
46
to
I

Fluid
flow

As
car

speed
and

governor
pressure

increase
the

governor

pressure
acting

on
the
end
of
the
1

2
shift

valve

Manual
Valve
I
Automatic
Tra

l
mission

Front

Bear
set
Rear

gear
set

Input
throuah
rear
clutch

AT331

1f

j
cW
oo
w

I

ATD79

Front
Clutch

Rearc1utch

Low
and
reverse
brake

Broke
band

One
way
clutch
OFF

ON

OFF

ON

OFF

AT447

F
S
AT
14
MechanicalOperation
during

DJ
Range

overcomes
the
force
of
the
1
2

shift

valve

spring
and
line

pressure
This

allows
the

1
2
shift

valve
to
move
to
the

upshift
position
which
directs
line

pressure

through
the

2nd
lock
valve

and

on
to
the
brake
band

Governor
Valve

15
Pressure
Modifier
Valve

2nd
3rd

Timing
Valve

2nd
3rd
Shift
Valve

1st
2nd
Shift
Valve

econd
Lock
Valve
9

Band
Servo

I
Apply
Side
1st
2nd
Shift
Valve
8

l
Rear

CIutclt

I

Second

Lock
Valve
2

3
Second
Lock
Valve

L

Orifice
Check
Valve
2nd
3rd
Shift
Valve

AT
14

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

Automatic
Transmission

2
RANGE

2ND

GEAR

The

range
2

position
is
used
to

lock
the
car
in

2nd
gear

preventing

upshifts
or
downshifts
under

any
con

ditions
Fluid
flow

opening
the
valVe

and

alloWing
pr

sure
to

p
into

the
line
of
the

throttle
valve
thus

assuring
adequate

throttle

pressure
even

during
decelera

tion

J
he
downshift
solenoid
valve
is

used
as
a

passage
for
line

pre
re
to

lock

the
1

2
and
2
3
shift
valves
Po
r
flow

Power
flow
in
2

raogo
is
the
same

as
in

D2
range
Uoe

pressure
from
the

manual

valve

opens
the
second

lock
valve

against
spring

pressure
As

this
valve

opens
pressure
the
passes
to

apply

the
band
servo
Une

pressure
also

flows
to
the
throttle
back

up
valve

UlllV
I
Governor
Valve

IS
Pressure
Modifier
Valve

2nd
3rd

Timing
Valve

2nd
3rd
Shift
Valve

1st

2nd
Shift

Valve

1st
2nd
Shift
Valve

j
Rear
Clutch

2

1
Band
Servo

Apply
Side

l

Solenoid
Downshift
Vilve

1312nd
3rd
Shift
Valve

1st

2nd
Shift
Valve
Second
Lock
Valve
9

4

Throttle
Back

up
Valve
17

Vacuwn
Throttle
Vilve
16

l
Jre
ModifJerVilve

2nd
3rd
Shift
Valve

2nd
3rd

Timing
Valve

Throttle
Drain
Valve

Pressure

Regulator
Valve

AT
20