checking oil DATSUN B110 1973 Service Repair Manual

Low
in

the

range
I
is

led
to

the
low

and
reverse
clutch
from
the

line

pressure
5

through
the
line

pressure
12
and
at
the
same
time

the
same
is
led
to
the
left
end

spring

unit

Consequently
although
the

go

vernor

pressure
increases
the
valve
is

still

depressed
toward
the

right
and

the
SFV
is

fixed
in
the
Low

posi

tion
When

kicked
down

at
the

2nd

speed
the
SDV

operates
and
the

line

pressure
13
depresse
the
FSV
to

ward
the

right

Although
the

governor

pressure
15
is

considerably
high
the

valve
is

depressed
completely
toward

the

right
and
the

FSV
is

returned
to

the
Low

position
This

operation
is

called
Kick
down

shift

2nd
3rd
shift
valve
SSV

The
SSV
is

a
transfer
vaIve
which

shifts

speed
from
2nd
to
3rd

When
the
vehicle
is

stopped
the

SSV
is

depressed
toward
the

right
by
the

spring
and
is
in

the
2nd

position
It

is

provided
however
that
the
FSV

decides
the

shifting
either

to
Low

or

2nd

When
the

vehicle
is

running
the

governor

pressure
15
is

applied
to

the

right
end
surface
and
the
SSV
is

depressed
toward
the

left

Contrarily

the

spring
force
line

pressure
3
and

throttle

pressure
19

depress
the

SSV

toward
the

right

When
the

vehicle

speed
exceeds
a

certain
level
the

governor

pressure

exceeds
the
sum
of
the

spring
force

line

pressure
and
throttle

pressure
the

valve
is

depressed
toward
the
left
and

the
line

pressure
3
is
closed
Conse

quently
the
forces

are
rapidly
un

balanced
the
force
to

depress
the
SSV

toward
the

right
reduces
and
thus
the

SSV
is

depressed
to
the
Ie
ft
end

for
a

moment

With
the
SSV

depressed
to

ward
the

left
end
the
line

pressure
3

is

connected
with
the
line

pressure

10
the

band
servo
is
released
the

front
clutch
is

engaged
and

speed
is

shifted

to
3rd

When

the
accelerator

pedal
is

de

pressed
both
the
line

pressure
3

and

the
throttle

pressure
19

are

high
and
AUTOMATIC
TRANSMISSION

therefore
the

SSV
is

retained
in

2nd
unless
ihe

governor
pressure

IS
exceeds

the
line

pressure
3
and

the

throttle

pressure
19

In

the
3rd

position
force
to

depress
the

SSV
toward
the

right
is

remained

only
on
the
throttle

pressure

16
and

the
throttle

pressure
16
is

slightly
lower
than
that

toward
the

right
which
is

applied
while

shifting

from
2nd
to
3rd

Consequently
the
SSV
is
returned

to
the

2nd

position
at
a

slightly
low

speed
side

Shifting
from
3rd
to

2nd

occurs
at

a
speed

slightly
lower

than
that
for

2nd
to
3rd

shifting

When
kicked
down
at
the
3rd

line

pressure
13
is
led
from
the
SDV

and
the
SSV
is

depressed
toward
the

right
Although
the

governor
pressure

is

considerably
high
the
valve
is

de

pressed
completely
toward
the

right

and
thus
the
SSV
is
returned
to

2nd

position
This

operation
is

called
Kick
down
shift

When
the
shift
lever
is
shifted

to

2
or
I

range
at
the

3rd

speed

the
line

pressure
3
is

drained
at

the

MNV

Consequently
the
front
clutch

operating
and
band
servo

releasing
oils

are
drained
As

the

res
lIt
the
trans

mission
is
shifted

to
the
2nd
or

low

speed
although
the

SSV
is
in

the
3rd

position

When
the

speed
is
shifted
to
the

3rd
a

one

way
orifice
24
on
the

top
of
the

SSV
relieves
oil

transmitting

velocity
from
the
line

pressure
3

to

the
line

pressure
10
and
reduces
a

shock

generated
from
the

shifting

Contrarily
when
shifted
from
3rd

to
2
or

range
and
the

speed
is

shifted
to
the
2nd

spring
of
the
orifice
24
is

depressed
the
throttle

becomes
ineffective
the

line

pressure

10
is

drained

quickly
and
thus

delay
in
the

speed
shifting
is

elimi

nated

Throttle

of
the

line

pressure
6

relieves
the
oil

transmitting
velocity

from
the

line

pressure
6
to
the

line

pressure
10
when

the
lever
is

shifted

to
the

R

range
and
relieves
drain

velocity
from
the
line

pressure
10
to

the
line

pressure
6

when

shifting

from
3rd
to

2nd
at

the
D

range
Thus
the
throttle
of
the
line

pressure
6
reduces

a
shock

generated

from
the

shifting

A

plug
in
the
SSV
left

end

readjust

the
throttle

pressure
16
which
varie

depending
on
the

engine
throttle
con

dition
to
a

throttle

pressure
19

suited
to
the

speed
change
control

Moreover
the

plug
is

a
valve
which

applies
line

pressure
13
in

lieu
of
the

throttle

pressure
to
the

SSV
and
the

FSV
when
kick

down
is

performed

When
the
throttle

pressure
16
is

applied
to
the
left
side
of
this

plug

and
the

plug
is

depressed
toward
the

right
a
slight

space
is
made
from
the

throttle

pressure
16
to

19
A
throt

tIe

pressure
19
which
is
lower

by
the

pressure
loss

equivalent
to
this

space
is

generated
the

pressure
loss
is
added
to

the

spring
force
and
thus

the

plug
is

depressed
back
from
the

right
to
the

left

When
this

pressure
19
increases

excessively
the

plug
is
further
de

pressed
toward
the
left

space
from

the

throttle

pressure
19
to
the
drain

circuit

13
increases
and
the
throttle

pressure
19
lowers
Thus
the

plug
is

balanced
and
the

throttle

pressure

19
is
reduced
in
a

certain
value
b

3
Orifice

t

checking
valve

24

15

2
2

i
I

1
c

V
Y
ii
pr

W
jt1

iff
I
W
q

I
nHH

J

L19
H
10

15

AT
9
A

T098

Fig
AT

13
2nd
3rd

shiflvalue

Fig
A
T
49

Torque
converter

aligning
cut

3
When

connecting
torque
con

verter

to
transmission

measure
dis

tance
A

to
be

certain
that

they
are

correctly
assembled
See

Figure

AT
50

Distance
A

More
than
16
5
IllIll

0
650
in

A

AT117

Fig
A
T
50

Installing
torque
converter
CHASSIS

4
Bolt
converter
to
drive

plate

Tightening
torque

0
8

to
1
0

kg
Ill
5
8
to
7
2
ft
Ib

Note

Align
chalk

marks

painted
a

cross

both

parts
during
disas

sembling
processes

5

After
converter
is
installed

rotate

crankshaft

several
turns
and
check
to

be
sure
that

transmission
rotates

freely

without

binding

6
Pour

recommended
automatic

transmission
fluid

up
to

correct
level

through
oil

charge

pipe

7

Connect
manual

lever
to

shift

rod

Operation
should
be
carried

out

with
manual
and

selector
levers
in

N

8
Connect

inhibitor
switch
wires

Notes

a
Refer
to

covering
topic

under

Checking
and

adjusting

inhibitor
switch
on

page

AT
51

b

Inspect
and

adjust
switch
as

above
whenever
it
has

to
be

removed
for

service

9
Check
inhibitor
switch
for

op

eration

AT
34
Starter
should

be

brought
into

op

eration

only
when
selector
lever
is
in

P
and
N

positions
it

should
not

be

started
when
lever
is
in
D

2

1
and
R

positions

Back

up
lamp
should
also

light

when
selector
lever
is

placed
in
R

position

10
Check
level
of
oil
in

transmis

sion
For
detailed

procedure
see

page

AT
49

II
Move

selector
lever

through
all

positions
to
be
sure
that
transmission

operates
correctly

With
hand
brake

applied
rotate

engine
at

idling
Without

disturbing

the

above

setting
move

selector
lever

through
N

to
D

to
2
to
I

and
to
R
A

slight
shock
should
be

felt

by
hand

gripping
selector
each

time
transmission
is

shifted

Note
See

page
AT

50
for

checking

enigne

idling

12

Check
to
be

sure
that
line

pres

sure
is
correct

To

do
this
refer
to

relative

topic
under

Testing
line

pres

sure
on

page
AT
53

13

Perform

stall
test

as

per
the

instructions
on

page
AT

51

AUTOMATIC
TRANSMISSIO
N

TROUBLE
DIAGNOSES
AND
ADJUSTMENT

INSPECTION
AND
ADJUSTMENT

BEFORE
TROUBLE
DIAGNOSIS

Testing
instrument
for

inspection

Checking
oil
level

Inspection
and

repair
of
oil

leakage

Checking
engine

idling
rpm

Checking
and

adjusting
kick
down
switch

and
downshift
solenoid

Inspection
and

adjustment
of
manual

linkage

Checking
and

adjusting
inhibitor
switch

STALL
TEST

Stall

test

procedures

Judgement

As
the
troubles
on

the
automatic

transmission
can
be

mostly
repaired
by

doing
simple
adjustment
so
do

not

disassemble

immediately
if
the

auto

m
tic
transmission
is
in
trouble

Firstly
inspect
and

adjust
the
auto

matic
transmission
with

mounting
on

vehicle

by
observing
the

trouble

shooting
chart

If
the

trouble
could
not
be

solved

by
this

procedure
then

remove
and

disassemble
the
automatic
transmis

sion
It

is
advisable
to
check

overhaul

and

repair
each

point
in
the

order

itemized
in

the
trouble

shooting

chart

l
In
the

trouble

shooting
chart

the

diagnosis
items

are

arranged
in
the

order
from

easy
to

difficult
and
there

fore

please
follow
these
items

The

transmission
should
not
be
removed

unless

necessary

2
The

test
and

adjustment
for
trou

ble

diagnosis
should
be
made

on
the

basis
of
standard
values
and
the
data

should
be
recorded
ROAD
TEST

Car

speed
at

gear
shift

Checking
speed

changing
condition

Checking
items

during
speed
change

Shift
schedule

LINE
PRESSURE
TEST

Line

pressure
governor
feed

pressure

Judgement
in

measuring
line

pressure

TROUBLE
SHOOTING
CHART

Inspecting
items

Trouble

shooting
chart
for
3N71
B
Automatic

Transmission

Trouble

shooting
guide
for
3N718
Automatic

Transmission
CONTENTS

AT
49

AT
49

AT
49

AT
50

AT
50

AT
50

AT
51

AT
51

AT
51

AT51

AT
52

INSPECTION
AND

AD
JUSTMENT

BEFORE

TROUBLE

DIAGNOSIS

Testing
instrument
for

inspection

1

Engine
tachometer

2
Vacuum

gauge

3
Oil

pressure
gauge

It

is
convenient
to

install
these

instruments
in
a

way
that
allows

meas

urements
to
be
made

from
the
driver
s

seat

Checking
oil

level

In

checking
the
automatic
transmis

sion
the
oil

level
and

the
condition
of

oil
around

the
oil
level

gauge
should
be

examined

every
5

000
km
3
000

miles
These

steps
are

easy
and

effec

live

in
trouble

shooting
as
some

change
of
oil
conditions
are

linked

with

developed
troubles
in

many
cases

AT
49
AT
52

AT
52

AT
53

AT
53

AT
53

AT
53

AT
53

AT
54

AT
54

AT
54

AT
55

AT
5B

For
instance

Lack

of
oil
causes
defective

opera

tion

by
making
the
clutches
and

brakes

slip
developing
severe

wear

The

cause
of

this

operation
is
that

the

oil

pump
has

begun
to

suck
air

which

caused
oil

foaming
thus

rapidly

deteriora

ting
the
oil

quality
and

pro

ducing
sludge
and

varnish

Meanwhile
excessive
oil
is
also
bad

as
in
the

case
of

a
lack

of
oil
because

of
oil

foaming
by
being
stirred

up
by

the

gears
Moreover
in

high
speed

driving
with
excessive
oil
in
the
trans

mission
the
oil

often
blows
out
from

the
breather

I

Measuring
oil
level

When

checking
the
fluid
level
start

the

engine
and
run
it
until
normal

operating
temperatures
oil

tempera

ture
50
to

800e
122
to
176
F

Approximately
ten
minute

operation

will
elevate
the

temperature
to
this

range
and

enigne
idling
conditions

are
stabilized
Then

apply
the
brakes

and
move
the
transmission

shift
lever

through
all
drive

positions
and

place

the
lever
in

park
P

position
In
this

inspection
the
car
must
be

placed
on
a

level
surface

The
amount
of
the
oil

varies
with

the

temperature
As
a
rule
the
oil

level

must
be

measured
after
its

tempera

ture
becomes

sufficiently
high

I
Fill
the
oil

to
the
line
H

The

difference
of

capacities
between
both

H

and
L

is

approximately
0
4

liter
7
8

U
S

pt
3
4

Imper

pt
and

therefore
take

care
not
to
fill

beyond

the

line
H

2
At
the
time
of
the

above

topping
up
and

changing
of
oil
care

should
be
taken
of
to

prevent
mixing

the
oil
with
dust
and

water

2

Inspecting
oil
condition

The
condition
of
oil

sticking
to
the

level

gauge
indicates
whether
to
over

haul
and

repair
the
transmission

or

look

for
the

defective

part

If
the

oil
has
deteriorated
into

a

varnish
like

quality
it

causes
the
con

trol
valve
to

stick
The
blackened
oil

gives
the

proof
of
the
burned
clutch

brake
band

etc
In

these
cases
the

transmission
must
be

replaced

Notes
a
In

oil
level

checking
use

special

paper
waste
to

handle

the
level

gauge
and
take

care

not
to
let
the

scraps
of

paper

and
cloth

tick
to
the

gauge

b
Insert

the

gauge
fully
and

take

it
out

quickly
before

splashing
oil
adheres
to
the

gauge
and
theu
observe
the

level

c

Use
automatic
transmission

fluid

having
DEXRON

iden

tIficatIon

only
in
the
3N71
B

automatic
transmission

d

Pay
atteutIon

because
the

oil
to

be
used
dIffers
from
that

i

used

in
the
Nissan
Full

Automatic

Transmission

3N7IA

Never
mix
the
oil
with

that
CHASSIS

Inspection
and

repair
of
oil

leakage

When
oil

leakage
takes

place
the

portion
near
the

leakage
is
covered

with
oil

presenting
difficulty
in
de

tecting
the

spot
Therefore
the

places

where
oil

seals
and

gaskets
are

equipped
are

enumerated
below

I
Converter

housing

The
rubber

ring
of

oil

pump
hous

ing

The
oil

eaI
of
oil

pump
housing

The
oil

seal
of

engine
crankshaft

The
bolts
of
converter

housing
to

case

2

Transmission
and
rear
extension

Junction
of
transmission
and
rear

extension

Oil
tube
connectors

Oil

pan

Oil

pressure
inspection
holes
Refer

to

Figure
AT

112

The

mounting
portion
of
vacuum

diaphragm
and

downshift
solenoid

Breather

and
oil

charging

pipe

Speedometer
pinion
sleeve

The
oil
seal

of
rear
extension

To

exactly
locate

the

place
of
oil

leakage
proceeds
as
follows

Place
the

vehicle
in
a

pit
and

by

sampling
the

leaked
oil
examine

whe

ther

it
is
the

torq
le
converter
oil
or

not

The

torque
converter
oil

assumes

color
like
red
wine

when

shipped

from
the

factory
so
it
is

ea

ily
distin

guished
from

engine
oil

or

gear
oil

Cleanly
wipe
off
the

leaking
oil
and

dust
and
detect

the

spot
of
oil

leakage

Use
nonflammable

organic
solvent

such
as
carbon

tetrachloride
for

wip

ing

Raise
the

oil

temperature
by

op

erating
the

engine
and

shift
the

lever

to
0
to

heighten
the

oil

pressure

The

spot
of
oil

leakage
will
then

be

found

more

easily

Note

A

the
oil

leakage
from
the

breather
does
not
take

place

except
when

running
at

high

speed
it
is

impossible
to
locate

the

spot
of

leakage
with
vehicle

stalled

AT
50
Checking
engine
idling

rprn

The

engine
idling
revolution
should

be

properly

adjusted

If
the

engine
revolution
is

too
low

the

engine
does
not

operate
smoothly

and
if

too

high
a

strong
shock
or

creep
develops
when

changing
over

from
N

to
D
or

R

Specified

idling
speed

650

rpm
at
D

position

800

rpm
at
N

position

Checking
and

adjusting
kick

down
switch
and

downshift

solenoid

When
the

kick
down

operation
is

not
made

properly
or

the

speed
chang

ing
point
is
too

high
check
the

kick

down
switch

downshift
solenoid
and

wiring
between
them

When
the

igni

tion

key
is

positioned
at
the

1st

stage

and
the

accelerator

pedal
is

depressed

deeply
the
switch
contact
should
be

closed
and
the

solenoid
should
click

If

it

does
not
click
it

indicates

a
defect

Then
check

each

part
with

the

testing

instruments

See

Figure
AT
I09

0
0

1
M

r

7

I

Y

ATl08

Fig
A
T
l

09

Downshift
solenoid

Note

Watch
for
oil

leakage
from

transmission
case

c

Inspection
and

adJu
Stmenf
trouble
first
check

the

linhge
f
no

1
i

jI
fect

is
found
in
the
lin1

age
check

of

manu
a
l

liiiJ
i

the
inhibitor
switch

Th

d
1F

aI
S
t
th
I
I
f
e

a

JU
i

J
u

epara
e
e

range
se
eet

ever
rom

Iy

important
ii
s3

ns
etion
of
oil
the
lower
shift

rod
and
turn
the

range

1

level
for
the
automatiC

tran
smission
select
lever
to
N

Therefore

great
care
should

be
exer

Note

In
the

position
N

the
slot
of

cised
because
defective

adjustment
will

the
manual
shaft
is

vertical

result
in

the
breakdown
of
the

trans

By
the
use
of
the
tester
check

the

two
bIack

yellow
BY
wires

from
the

inhibitor
switch
in
the

ranges
N

and

P

and
the

two
red
bIack

RB
wires

in
the

range
R
for

continuity
Turn

range
select
lever
to
both

directions

from
each
lever
set

position
and
check

each

continuity

range
It
is

normal
if

the

electricity
is
on
while
the

lever
is

within

an

angle
of

about
3
0

on

both

sides
from
each

lever
set
line
How

ever
if
its

continuity
range
is
obvi

ously
unequal
on
both

sides
the

adjustment
is

required

f

any
malfunction
is

found
un

screw
the

fastening
nut
of
the

range

selector
lever

and
two

fastening
bolts

of

the
switch

body
and
then
remove

the
machine
screw

under
the
switch

body
Adjust
the
manual
shaft
correct

ly
to
the

position
N

by
means
of

the
selector
lever

When
the
slot
of

the
shaft

becomes
vertical
the
detent

works
to

position
the
shaft

correctly

with

a
click
sound

Move
the

switch

slightly
aside
so

that
the
screw
hole
will
be

aligned

with
the

pin
hole
of
the
internal
rotor

combined
with
the

manual
shaft
and

check
their

alignment
by
inserting
a

1
5

0101
0
0591
in
diameter

pin
into

the
holes
If

the

alignment
is

made

correct
1
5ten
the
switch

body
with

the

bolts

pull
out
the

pin
and

tighten

up
the
screw

again
into
the
hole
and

fasten
the
selector
lever
as
before

Check
over

again
the

continuity
with

the

tester
If
the
malfunction
still

remains

replace
the
inhibitor
switch
mission

Inspection

Pull
the
selector
lever

toward

you

and
turn
it

so
far
as
p

to
1

range

where
clicks
will
be
felt

by
hand
This

is

the
detent
of
manual
valve
in
the

body
and
indicates
the
correct

posi

tion

of
the

lever

Inspect
whether
the

pointer
of

selector
dial

corresponds
to
this

point

and
also
whether
the
lever

comes
in

alignment
with
the

stepping
of

posi

tion

plate
when
it
is

released

Adjustment

This

procedure
can

be
accom

plished
by
referring
to
Removal
and

nstallation

Checking
and

adjusting

inhibitor
switch

The
inhibitor
switch
serves

to
light

the

reverse

lamp
in
the

range
R
of

the
transmission

operation
and
also
to

rotate
the

starter
motor
in
the

ranges

N
and
P

j

r@
I

If

r
f
B

@
I

Jt
@
@

c
v@

i

r
fji

AT109

1
Inhibitor

switch

2
Manual

shaft

3
Washer

4

Nut

5

Manual

plate

Fig
AT
II
0
Con
truction

of
inhibitor

witch
6
Washer

7

Nut

8
Inhibitor
switch

9

Range
select
lever

Check
whether
the

reverse
lamp

and
the
starter
motor

operate
normal

ly
in

these

ranges
If
there
is

any
t

ki

A

mm
ATIC
TRANSMISSION

STALL
TEST

The

purpose
of
this
test
is
to
check

the
transmission

and

engine
for

trou

ble

by
measuring
the
maximwn

num

bers
of
revolutions
of
the

engine
while

vehicle
is
held
in
a
stalled
condition

and
the
carburetor
is
in
full

throttle

operation
with

the
selector
lever
in

AT
51
rang
s
D
2

and
I

respectively

and

by
com

pairing
the
measured

re

sults

with
the

standard
values

Standard
stall
revolution

1
750
to
2
000

rpm

Components
to
be
tested
and
test
items

1

Clutches
brake

and
band

in

trans

mission

for

slipping

2

Torque
converter

for
function

3

Engine
for
overall

property

Stall
test

procedures

Before

testing
check
the

enigne
oil

and

torque
converter
oil

warm

up
the

engine

cooling
water
to
the

suitable

temperature
by

warming
up

ope
ration

at

1
200

rpm
with
the

selector
lever
in

the

range
P

for
several
minutes

and

warm

up
the

torque
converter
oil

to

the

suitable

temperature
60
to
IOOoC

140
to
2120F

1
Mount
the

engine
tachometer
at
a

location
that
allows

good
visibility

from

the
driver

s
seat
and

put
a
mark

on

specified
revolutions

on
the
meter

2
Secure
the

front
and
rear
wheels

completely
with
chocks
and

apply
the

hand
brake
Be

sure
to

depress
the

brake

pedal
firmly
with
the
left
foot

before

depressing
down
the
accelerator

pedal

3
Throw
the

selector
lever
into
the

range
D

4

Slowly
depress
the

accelerator

pedal
down
till
the

throttle
valve
is

fully
opened
Quickly
read
and
record

the

engine
revolution
when
the

engine

begins
to
rotate

steadily
and

then

release
the
accelerator

pedal

5
Turn
the

selector
lever
into
N

and

operate
the

enigne
at

approxi

mately
1

200

rpm
for
more
than
one

minute

to
cool
down
the

torque
con

verter
oil
and
coolant

6
Make
similar
stall
tests
in
the

ranges
2
I

and
R

Note

The
stall
test

operation
as

spec

ified
in

the
item
4
should
be

made
within
five
seconds
If
it

takes
too

long
the
oil
deterio

rates
and
the

clutches
brake

Checking
speed

changing

condition

The

driver
s

feeling
during
gear

changes
should
also
be

checked
at

tentively

1
A

sharp
shock
or
unsmoothness

are
felt

during
a

gear
change

2

A

gear
change
is
made
with
a

long

and

dragging
feeling

These
indicate

that
the
throttle

pressure
is
too
low
or

some
valve

connected
to
the
throttle
is
defective

Checking
items

during

speed
change

1
In
D

range
gear
changes
DI
o

D2

D3
are
effected
In
R

range

the

speed
does

not
increase

2

The
kick
down

operates
properly

3

By
moving
the
lever
from
D

into
I

gear

changes

D3
2
12

II
are

effected
In
the

ranges
12

and

II
the

engine
braking
works

properly

4
In
the

speed
does
not
in

crease

5
Should
be

quickly
fixed
at
2

range

6
In
P

vehicle
can
be

parked

properly

If

any
malfunction
occurs
in
the

second

gear
during
the
road
test
that

is
if

vehicle
shakes

drags
or

sling
in

shifting
up
from

DI
directly
to

D3
or
in

shifting
up
from
D
to
W
I

r

I

1

1

I
2
31

I

I

I

I

I

t

Lh

I

I

I

I

1000
lsOo

2000
2500

Output
shaft

speed
rpm
AUTOMATIC
TRANSMISSION

D2
the

brake

band
should
be
ad

justed
If

these

troubles
remain

after

Shift

schedule

o

Full
throttlell

e

2100

E
E

200

is

Z

cu

300

mmHg

soo

o

soo

LINE

PRESSURE
TEST

When

any

slipping
occurs
in

clutch

or
brake
or

the

feeling
during
a

speed

change
is

not

correct
the
line

pressure

must
be
checked

Measuring
the
line

pressure
is

done

by
a

pressu
re

gauge
attached
to

two

pressure

measuring
holes
after

re

moving
blind

plugs
located
at

trans

mission

case
See

Figure
AT

112

The

line

pressure
measurement

is

begun
at

idling
and

taken

step
by

step

by

enlarging
the
throttle

opening

1
A

sharp
shock
in

up

shifting
or

too

high

changing
speeds
are
caused

mostly
by
too

high
throttle

pressure

2

Slipping
or

incapability
of

opera

Line

pressure
governor
feed

pressure

At
cut

back

point
After
cut
back

Throttle

opening
under

approximately
over

approximately

15

kmfh
9

MPH
35

kmfh
22
MPH

Unit

mmHg
Unit

kg
cm2

psi
Unit

kg
cm2

psi

Full
throttle

0
94
to
11
0

134
to
156
5
5

to
6
5

78
to

92

Minimum
throttle
450
3
0

to
4
0
43

to
57
3

0
to
4
0
43

to
57

Full
throttle
0
10
0
to
12

0

142
to

171
5
5

to
7
0

78
to
100

Minimum

throttle
450

6
0
to

12
0
85toI71
5
5
to
7
0

78
to

100

Full
throttle
0

14

0
to
16

0

199
to

228
14
0

to
16
0

199
to
228

Minimum

throttle
450

3

0
to
5
5

4310
78
3

0
to
5
5

43
to
78
Range

D

2

R
the
brake
band
is

adjusted
check

the

servo

piston
seal
for
oil

leakage

3

30ixI
3500
000

AT110

Fig
A
T

llI

Shift
schedule

tion
is

mostly
due
to
oil

pressure

leakage
within

the

gear
trains
or

spool

valve

AT113

I

Line

pressure

2

Governor
reed

3

Servo
release

pressure

Fig
A
T
112

MeCJ8uring
line

pressure

Notes
a
The
line

pressure
during

idling
corresponds
to

the
oil

pressure
before

cut
down

at
minimum

throttle

b
The
oil

pressure
After
cut
back
means

that
after
the

pressure
modifier

valve
has

operated

AT
53

Judgement
in

measurmg

line

pressure

I
Low

idling
line

pressures
in
the

ranges
D
2
loR

and
P

It
can

be
artributed
to
trouble
in

the

pressure
supply
system
or
too
low

output
of

power
caused

by

1
A

worn
oil

pump

2

An
oil

pressure
leakage
in
the
oil

pump
valve

body
or

case

3
A

sticking
regulator
valve

2
Low

idling
line

pressures
in

cer

tain

ranges
only

It

is
caused

pressumabIy
by
an
oil

leakage
in

the
devices
or
circuits
con

nected
to
the

relevant

ranges

1
When
there
is
an
oil

leakage
in

the

rear
clutch
and

governor
the
line

pressures
in
D

2
and
I
are

low

but
the

pressure
is

normal
in

R

2

When

an
oil

leakage
occurs
in

the

low

and
reverse
brake
circuit

the

line

pressures
in

R
and
p

are
low

but
the

pressure
is

normal
in
0

2

and
I

3

High
idling
line

pressures

It

is

presumed
to
be

caused

by
an

increased
vacuum
throttle

pressure

owing
to
a

leakage
in
the

vacuum
tube

or

diaphragm
or

by
an
increased
line

pressure
due
to
a

sticking
regulator
CHASSIS

valve

Vacuum

leakage
is

checked

by
di

reetly
measuring
the

negative

pressure

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
blows

up
the
white

smoke

4

Checking
items

when
the
line

pressure
is

increasing

In
trJs

checking
the
line

pressure

should
be
measured
with

vacuums
of

450
mmHg
and
0

mmHg
in
accordance

with
the
stall
test

procedure

test

procedure

1
If
the
line

pressures
do

not

increase

despite
the
vacuum
decrease

check
whether
the
vacuum
rod
is

incorporated

2
If

the
line

pressures
do
not
meet

the
standard
it
is
caused

mostly
by
a

sticking
pressure
regulating
valve

pres

sure

regulating
valve

plug
or

amptifier

TROUBLE
SHOOTING

CHART

Inspecting
items

1

Inspection
with

automatic

trans

mission
on

vehicle

J

AT
54
A
Oil

level

B

Range
selecr

linkage

C
Inhibitor
switch
and

wiring

D

Vacuum

diaphragm
and

piping

E

Downshift
solenoid
kick
down

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

quantity

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

Leakage
of
oil

passage

u

One

way
clutch
of

torque
converter

v

One

way
clutch
of
transmission

w

Front
clutch
check
ball

x

Parking
linkage

y
Planetary
gear

CHASSIS

Trouble

shooting
guide
for

3N71B
Automatic
Transmission

Order
Test
item

Checking
Oil

level

gauge

2
Downshift
solenoid

3

ManuaIlinkage

4

Inhibitor
switch

5

Engine
idling
rpm

6
Vacuum

pressure
of
vacuum

pipe

7

Operation
in
each

range

8

Creep
of
vehicle

Stall
lest
Oil

pressure
before

testing

2
Stall
test

3

Oil

pressure
after

testing

Road
test
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

by
sound
whether
solenoid

operates
when

depressing

accelerating
pedal

fully
with

ignition
key
ON

Check

changing
conditions
into

P
R

N
D
2

and
I

ranges
by
moving
selector
lever

Check

whether
starter

operates
in
N

and
tp

ranges
only

and
whether

reverse

lamp
operates
in
R

range
only

Check
whether

idling
rpm
meet
standard

Checking
whether
vacuum

pressure
is
more
than
450

mmHg

in

idling
and

whether
it

decreases
with

increasing
rpm

Check
whether
transmission

engages
positively
by
shifting

N
o
D
N
2
N
I

and
N
R

range

while

idling
with
brake

applied

Check
whether
there

is

any

creep
in
D
2
I
and

R

ranges

2
1

and
R
range
Measure
line

pressures
in
D

while

idling

Measure

engine
rpm
and
line

pressure
in
D
2
I

and

R

ranges
during
fullthrallIe

operation

Notes

a

Temperature
of

torque
converter
oil

used
in
test
should

be

from
600
to
lOOoC

1400
to
2120F
i
e

sufficiently

warmed

up
but
not
overheated

b

For

cooling
oil

between
each
stall
test
for
D
2

1

and
R

ranges
idle

engine
i
e

rpm
at
about

1
200

rpm
for
more
than
1
minute
in
P

range
Measurement

time
must
not
be
more
than
5
secon

Same
as
the
item
I

Check
vehicle

speeds
and

engine

rpm
in

shifting
up
1st

2nd

range
and
2nd
J
3rd

range
while

running
with

lever
in

D

range
and

engine
vacuum

pressure
of

about
200

mmHg

Same
as

the
item
1
above

except
with

engine
vacuum

pressure
of
0

mmHg
i
e
in

position
just
before
kick

down

Check
whether
the
kick
down

operates
and

measure
the

time

delays
while

running
at
30
40
50

60
70
km
h

19

25
31
38
44
MPH
in
D

range

AT
58

I

CHASSIS

4

Adjust
the

preload
of
the
worm

bearing
by
selecting

the
thickness

of
he

worm

bearing
shim
five
kinds
0
05

to
0
20

mm
0
0020
to
0

0079
in
so
that
the
initial

torque
of
the

steering
wheel
is
2
0

to
5
0

kg
cm
27
8

to

694
in
oz
without
sector
shaft

J

Fig
ST
10

Measuring
initial

tunring
torque

Note

Apply
oil
on
the
worm

bearings
The

turning

torque
wheel
in
motion
should
be
100
to
250

gr

13
5
to
8

8
oz
at
20
em
7
874
in
radius
of
the

steering
wheel
As
to
the
standard
number
of
worm

bearing
shims
refer
to
the

following
table

Worm

bearing
shim

Thickness
mm
in

0
05
0
0020

0
07
0
0028

0
08
0
0031

0
10
0
0039

0
20
0
0079

5

Sector
shaft
lash

adjuster
end
clearance
Assemble

lash

adjuster
with

shim
in

the
slot
of
the

sector
shaft
end

Measure

clearance
0
05
mm
0

0020
in

To
obtain
this
clearance

five
various

thickness
shims

are
available
Adjusting
screw
shim

Thickness
mm

in

1
515
to
1
535
0
0596

to
0
0604

1
545

to
1
565
0

0608
to
0
0616

1
575
to
1
595
0
0620
to
0

0628

1

605
to
1

625
0
0632
to
0

0640

1
63510
1
655

0
0644
to
0
0652

Fig
ST
J
J

Checking
lash

adjuster
end
clearance

6
Assemble
the
sector

shaft
into

the

gear
housing

I
Rotate

worm

column

by
hand
unlil

ball
nut
is
in
the

center
of
its
travel
so
that
the

center
tooth

of

sector
shaft

enters
into

the
center

tooth

space
of

ball

nut

2

With

new

gasket
in

place
push
the

sector
shaft

cover
with
sector

shaft
in

place

After

making
sure
that

there
is
some

lash
between
the

rack
and

sector
teeth

tighten
side
cover

bolts

Tightening
torque
is
I
7
to
2

8

kg
m

I2
3
to
20
2

ft

lb

Note

Apply
oil
on
the
sector

shaft

3

Lock
the

adjust
screw
with

the

adjusting
screw
nut

temporarily

4
Move

the
sector
shaft

several
times
from
the

side
of

the

gear
arm
and
make

sure
it

turns

smoothly

5
Connect
the

gear
arm
to

the
sector
shaft
When

fitting
the

gear
arm

the

aligning
marks
on
the

gear
arm

and
sector

shaft
should
be

matched

correctly

ST

6

STEERING

6

Adjust
the
backlash
at

the
neutral

point
by
screwing

the

adjusting
screw
so
that
the
movement
of
the

gear
arm

top
end

radius
7
mm
5

00
in
is
within
0
1
mm

0
0039

in
and
lock

temporarily
by
the
nut

Fig
ST
12

Checking
backlash

Fig
ST

13

Adjusting
backlash
7
Fill

gear
oil
about
0
24
liter

I
2
US

pt
3
8

Imp
pt
into

assembly
through
f1ller
hole
and

install
a

mIer

plug

INSTALLATION

Installation
can

be

accomplished
in

the
reverse
order

of

removal

Pay
attention

to
the

following
points

I
Make

sure
that
the

steering
wheel

moves

smoothly

2

Check
the

alignment
of
the

steering
wheeL

3

Free
travel
of

steering
wheel

should
be
20

to
25
mm

0
787
to
0

984
in

COLLAPSIBLE
STEERING

CONTENTS

DESCRIPTION

STEERING
COLUMN

JACKET

TUBE

STEERING
POST
CLAMP
ST
8

ST
9

ST
10

ST
11
COLUMN
BEARING

DISASSEMBL
Y

INSPECTION

REASSEMBL
Y
ST
12

ST
12

ST
12

ST
13

ST
7