1979 DATSUN 210 Service Manual

JUDGEMENT
IN
MEASURING

LINE

PRESSURE

Low

idling
line

pressure
in
the

ranges
D
2

R
and
P

This
can
be
attributed
to
trouble
in

the

pressure
supply
system
or
too
low

output
of

power
caused

by

I
A

worn
oil

pump

2
An
oil

pressure
leak
in
the

oil

pump
valve

body
or
case

3
A

sticking
regulator
valve

2
Low

idling
line

pressure
i

n
cer

tain

ranges
only

This
is

presumably
caused

by
an
oil

leak
in
the
devices
or
circuits
con

nected
to
the
relevant

ranges

I
When
there
is

an
oil

leaJi
in

the

rear
clutch
and

governor
the

line

pressure
in
on
2
and
I

are
low

but
the

pressure
i

nonnal
in

R

2
When
an
oil
leak
occurs
in

the

low
and
reverse
brake
circuit
the
line

pressure
in

oR
and
P
are
low

b
t

the

pressure
is

normal
in

0
2

and

I

3

High
idling
line

pressure

Thi
is

presumably
caused

by
an

increased

aC

1ulT
t
rott
e

pr
ssure

owing
to
a

leak
in

the
vacuum
tube
or

diaphragin
or
by
an
increased
line
Automatic
Transmission

pressure
due
to
a

sticking
regulator

valve

Vacuum

leakage
is
checked

by

directly
measuring
the

negative

pres

sure
after

removing
the
vacuum

pipe

A

puncture
of
the
vacuum
dia

phragm
can
be

easily
ascertained

because
the

torque
converter
oil
is

absorbed
into
the

engine
and

the

exhaust

pipe
emits
white
smoke

4
Item
to
be
checked
when
the

Ii

e

pressure
is

increasing

In
this

c
1eck
the
line

pressure

should
be
measured
with
vacuums
of

300

mmHg
Il

SI

inHg
and
0

mmHg

0

inHg
in

accordance
with
the
staIl

test

procedure

i
If
the
line

pressure
does
not
in

crease

despite
the
vacuum
decrease

check
whether
the
vacuum
rod
is

i

corporated

2

If
the
line

pressure
does
not
meet

tile
standard
iUs

caused
mostly
by
a

sticking
pressure
regulating
valve

pres

sure

regulating
valve

plug
or

amplifier

TROUBLE
SHOOTING

CHART

INSPECTING
ITEMS

I

Inspection
with
automatic
trans

mission
on
vehicle

AT
45
A

Oil
level

B

Range
select

linkage

C
Inhibitor
switch
and

wiring

D

Vacuum

diaphragm
and

piping

E
Downshift

solenoid
kickdown

switch
and

wiring

F

Engine
idling

rpm

G

Oil

pressure
throttle

H

Engine
stall

rpm

I

Rear
lubrication

J
Control
valve
manual

K
Governor
valve

L

Band
servo

M
Transmission
air
check

N
Oil

quality

o

Ignition
switch
and
starter
motor

P

Engine
adjustment
and
brake
in

spection

2

Inspection
after

inspecting
auto

matic
transmission
on
vehicle

m
Rear

clutch

n

Front
clutch

q
Band
brake

r
Low
and
reverse
brake

s
Oil

pump

t

Leakage
of
oil

passage

u
One

way
clutch
of

troque
converter

v

One

way
clutch
of
transmission

w
Front

clutch
check
ball

x

Parking
linkage

y
Planetary
gear

Automatic
Transmission

r

TROUBLE
SHOOTING
CHART
FOR
3N71B

AUTOMATIC
TRANSMISSION

he
number
shown
below
indicates
the

sequence
in

which
the
checks

should
be
taken

up

Trouble

ABeD
EFGH
I

J
K
L

MNOP
In
n

q
r
e
t
u
v

wxy

Engine
does

not
start
in
N
P

2
3
1

ranges

Engine
starts
in
other

lange
than
N

1
2

and

P

Sharp
shock
in

shifling
from
N
10

2

I
1
3
4

@

0

range

Vehicle

will
not

run
in

D

range
bul

1
2

3

@

runs
in
2
I
and
R

ranges

Vehicle
will

not
run
in
0
I
2

ranges
but
runs
in

R

ronge
1
2

4
5
6
3

7

@
@

C1u
ch

slips

Vcrypoor
acc
ler
t

n

Vehicle
will
nol
run
in

R

range
but

runs
in
Dn

2
and
I

ranges
1
2
3

5
6
4

@@

@
@

C1urch

slips
Very
poor
cceleralion

I

Vehicle
will
not
run
in

any
range
I
2
3
5

16
4
@

@

Clutches
or
brakes

slip
somewhat

I
2
6

3
5
7
4

1
@@

in

starting

Vehicle
runs
in
N

wnge
I
3
2

I@

Maximum

speed
not

attained

I

2
4

5
7
6
3
8

@@@lNl

Acceleration

poor

Vehicle
braked
when

shifting
into

312
I

@
@
@

OR

range

Ex
cessive

creep

I
I

I
I

No

creep
at
all
I
2

I
3
5
4

@@
@

Failure
In

dlilnge

gear
fHlIll
nd

I
2

3
5
6
7
4

@
@

to

3rd

Fililurc
10
l

h

mgc

gC
lr
frolll
ISf

I
2
3
5
6

817
4

@
@
@

III
2nd

Too

high
a

gear
change

point
from

15
to
2nd
from

2nd

to
I
2
3
5
6

4

3rd

Gear

change
directly
from
Ist
to

2

4
3
1

@
@

3rd

occurs

AT46

Automatic
Transmission

Trouble

ABCDIEFGH
I
JKL
M
NO

P

mnqr
8
t
u
v

Iw
x

y

Too

sharp
a
shock
in

change
from

1

2
4
5
3

@

1st
to
2nd

Too

sharp
a
shock
in

change
from

1

2
3
3
5
4

ID

2nd
o
3rd

A1most
no
shock
or
clutches

slipping
in

change
from
1st
to
1

2
3
4
6

8
7
5

@
@

2nd

Almost
no
shock
or

slipping
in

@
@
@

change
from
2nd
to
3rd
1

2
3
4

6
8
7

5

Engine
races
extremely

Vehicle
braked

by
gear
change
from

2

I
1

@
Q

@I
ist
to
2nd

Vehicle
braked

by

gear
change
from

I
3

21
1

@

I
2nd
to
3rd

Failure
to

change
gear
from

1

3
4

6
5
2

@
@

3rd
to
2nd

Failure
to

change
gear
from
2nd

1

I
3
4

6
5
2

@I
to
htlt
or
from
3rd
to
1st

Gear

change
shock
felt

during

deceler
tion

by
releasing
1
2
3
4

5
6

V

accelerator

pedal

Too

high
change
point
from

V
3rd
to
2nd
from
2nd
to
1
2
3
4
5
6

list

Kickdown
does
not

operate
when

depressing
pedal
in
3rd
within

2
1
4

5
3

@
V

kickdown
vehicle

speed

Kickdown

operates
or

engine
over

runs
when

depressing
pedal
in

1
2

3
5
6
7
4

@
@
3rd

beyond
kickdown
vehicle

speed
limit

Races

extremely
or

slips
in

changing

V@
from

3rd
to
2nd

when
1
2
4

6
5
3

@
@

depressing
pedal

Failure
to

change
from
3rd
to

2nd

l
1

2
4

51
3

@

I
j

when

changing
lever
into
2

range

Gear

change
from

2nd
to

1st

or
from

2nd
to
3rd

in
2
1

2
3

range

AT
47

Automatic
Transmission

Trouble
ABeD
E
FG
H
1
J
KL
MNOP

mnqr
8
t

u
v
w

x

y

No
shock
at

change
from
I
to

2

6
7
5

@
@

lange
or

engine
races

extlemely
1
2
3
4
1

Failure
to

change
from
3rd
to

2nd

1
2
4
7
6

3

@@
@

when

shifting
lever
into
I

range

Engine
brake
does
not

operate
in

1

2
4
5

3

@

I

range

Gear

change
from
1st

to
2nd

or
from
2nd
to
3rd
in
1
1

2

@

range

Does

not

change
from
200

1
2

4
5
6
7
3

@
@

to
lst
in
1

range

Large
shock

changing
from
2nd

1

2
4
3

@

to
lst
in
I

range

Vehicle
moves
when

changing

into

P

range
or

pinking
gear
doe

1
2

not

disengage
when
shifted
out
of

P

range

Transmission
overheats
1
3
4
2
6
8
7

5

@@@
@@@
@

Oil
shoots
out

during
operation

White
smoke
emitted
from
exhaust
1

3
5
6
2
7
8
4

@@@
@@@
@

pipe
during
operation

Offensive
smeU
at
oil

charging
pipe
1
2

@@@@
@@
@i

Transmission
noise
in
p
and
ON

1

2
@

ranges

Transmission

noise
in
D
i

I

1

2
@
@
@
@

and
R

langes

AT
48

Automatic
Transmission

TROUBLE
SHOOTING
GUIDE
FOR
3N71B

AUTOMATIC
TRANSMISSION

Ordel
Test
item

Checking
Oil
level

gauge

j
Downshift
solenoid

3
Manual

linkage

4

Inhibitor
switch

5

Engine
idling
rpm

6
Vacuum

pressure
of
vacuum

pipe

7

Operation
in
each

range

g

Creep
of

vehicle

Stall
test
1
Oil

pressure
before
t
sting

2
Stall
test

3

Oil

pressure
after

teSling

Road
test
L

Slow
acceleration

Ist
2nd

2nd
3rd

2

Quick
acceleration

Ist
2nd

2nd
3rd

3
Kick
down

operation

3rd
2nd
or
2nd
1st
Procedure

Check

gauge
for
oil
level
and

leakage
before
and
after
each

test

Check
for
sound
of

operating
solenoid
when

depressing

accelerator

pedal
fully
with

ignition
key
ON

Check

by
shifting
into

P
R
N
0
2
and

ranges
with
selector
lever

Check
whether
starter

operates
in
N
and
p

ranges
only

and
whether
reverse
lamp
operates
in
R

range
only

Check
whether

idling
rpm
meet
slandard

Check
whether
vacuum

pressure
is
more
than
450

mmHg

17

72

inHg
in

idling
and
whether
it

decreases
with

increasing
rpm

Check
whether
transmission

engages
positively
by

shifting

N

0
N

2
N
to
I

and
N
R

range

while

idling
with

brake

applied

Check
whether
there
is

any
creep
in

0
2

and

R

ranges

Measure
line

pressures
in
D
2
I
and
R

range
while

idling

Measure

engine
rpm
and
line

pressure
in
0
2
t

and

R

ranges
during
full
throttle

operation

Note

Temperature
of

torque
con
erter
oil
used
in

test

should
be
from
6

to
lOO

C
140
to
2120F

i
e
suf

ficiently
1

up
but
not

o
heeted

CAUTION

To
cool
oil
between
IIch
mil

test
for
OH
ZH
1
H

Ind

RH

nnges
idle

engine
i
e

rpm
It
Ibout

1
200

rpm
for

more
thin
1
minutll
in

P

nnge
MeeRlr
ment
time

mUlt

not
be
more
then
5

seconds

Same
as
item
1

Check
vehicle

speeds
and

engine
rpm
in

shifting
up
1

st

2nd

range
and
2nd
3rd

range
while

running
with
lever
in

D

range
and

engine
vacuum

pressure
of
about

200

mmHg

7
87

inHg

Same
as
item

1
above

except
with

engine
vacuum

pressure
of

o

mrnHg
0

inHg
i
e
in

position
just
before
kickdown

Check
whether

the
kickdown

operates
and
measure
the
time

delays
while

running
at
30
40

50
60
70
km
h

19
25
31

37
43

MPH
in

OJ
range

AT
49

Oldel

Others
Automatic
Transmission

Test
item

4
Shift
down

Or
O
O

5
Shift
down

Or
I

1

6
Shift
down

0
2

7
Shift

up

1
1

8
Shift

up
or
down
when
start

ing
in

2

ranae

9

Parking

Abnormal
shock
oil

leakage
Procedure

Check
vehicle

speeds
and

engine

rpm
in

shifting
down
from

3rd
2nd
1st

sequentiaUy
while

coasting
with

accelerater

pedal
released
in
0

range
and

engine
vacuum

pressure
of
about
450

mmHg
17
72

inHg

Check
for
shifti

ng
do
n

I
I
nd

engine
blaking
and

further
for

shifting
down
I
I
and

engine
braking
tel

shifting
the
leyer
into

I

range
with
the
accelerator

pedal

released
and
the

engine
vacuum

pressure
of
0

mmHg
0

inHg

while

driving
at
about
50
km
h
30

MPH
in
0

range

Check
for

quick
shifting
down

OJ
2
and

engine
braking

after

shifting
the
lever
into
2

range
while

driving
at
about

50

km
h
30
MPH
in

0

range

Further
chec
for

locking
of
the
transmission
i

2nd

gear

ratio

regardless
of
vehicle

sPeed

Check
for
failure
of
the
transmission

to
shift

up
during

acceleration
when

starting
in

range

Check
the
transmission
for
not

shifting
up
or
down

during

acceleration

or
deceleration
when

starting
in

2

range

Confirm
that
yehicle
will
notmoye
on

grade
when

shifting

to
pn

range

Enter
into
record
conditions
observed

durq
these
lests

such
as

gear
noise

abnormal
clutch
noise

and
acceleration

performance

AT

50

Automatic
Transmission

SERVICE
DATA
AND

SPECIFICATIONS

General
specificetions

Automatic
transmission
model
3N71B

2
0
I

Stall

torque
ratio

Transmission

gear
ratio

1st

2nd

Top

Reverse
2
458

1458

1

000

2

182

Oil
Automatic
transmission

fluid

Dexron

type

Oil

capacity
5
5liten
SUUS

qt
4Ulmp
qt

Approximately
2
7
liten
2UUS

qt

2

lmp
qt
in

torque
converter

Spec
lcetlona
end

edJuatment

Automatic
transmission

assembly

Model
code
number

Non
California
models
Sedan
and
Hatchback

Non
Califomia
models

Wagon

California
models
All
models
X0l61

X0165

X01l5

Torque
converter

assembly

Stamped
mark

on
the
TIC

Front

clutch

Number
of

drive

plates

Number
of
driven

plates

Clearance

Thickness
of

retaining
plate
l2
C

mm
in

mm
in
3

3

1
6
to
2
0
0
063
to
0
079

10
6
0
417

10
8
0
425

11
0

0
433

11
2
0
441

II
4
0
449

11
6
0
457

Rear
clutch

Number
of

drive

plates

Number
of

driven

plates

Clearance

Thickness
of

retaining
plate
nun

in

mm
in
3

3

0
8
to
1
6
0
031
to
0
063

8
35
0
3287

AT
51

Automatic
Transmission

Low
eve

se
br
ke

Number
of
drive

plates

N

wnbe
of
driven

plates

Clearance

Thickness
of

retaining
plate
ml11
in

mm
in
3
3

0
80
to
1
25
0
031
to
0

049

15
8
0
622

16
0
0
630

16

2
0
638

16
4

0
646

16

6
0
654

16
8
0

661

Brake
band

Piston
size

Big
dia

Small
dia
mm
in

60

236

40
1
57

Control
valve

assembly

Stamped
mark

on
strainer

Non
California
models
Sedan
and
Hatchback

LEA

California
models
All
models
and
Non
California
models

Wagon
LRJ

Governor

assembly

Stamped
mark
on

governor
body
35

Stall

revolution

AI4

engine

AI5

engine
rpm

1

900
t02
200

1

850
to
2

150

TI
htenln

torque

Drive

plate
to

crankshaft

AI4

AI5
kg
m
ft
lb

Drive

plate
to

torque
converter

Converter

housing
to

engine

Hexagon
bolts
with
washer

Hexagon
flange
head
bolts

Transmission
case
to
converter

housing

Oil

pan
to

transmission
cue

Servo

piston
retainer

to
transmission

case

Piston

stem
when

adjusting
band
brake

Piston
stem
lock
nut
8
0

to
9
0
58
to
65

8
5

to
9
5

61
to
69

4

0
to
5

0
29
to
36

2

0
to
2
5
14
to
18

1

6
to
2
2

I2to
16

4
5
to
5
5
33

to
40

0
5
to

0
7

3
6
to
5
1

0
5

to
0
7

3
6
to
5
1

1

2
to
1
5
9
to
11

1
5
to

4
0

II
to
29

1
3
to
1

8
9
to
13

0
55
to
0
75
4
0
to

5
4

0
25
to
035
1
8
to
2
5

0
25
to
0
35
1
8
to
2
5

0
5
to
0
7
3
6
to
5
1
One

way
clutch

inner
race
to
transmission

case

Control

valve

body
to

transmission
case

Lower
valve

body
to

upper
valve

body

Side

plate
to
control
valve

body

Nut
for
control
valve

reamer
bolt

AT
52