manual transmission DATSUN 210 1979 Repair Manual

Automatic
Transmission

REMOVAL
AND

INSTALLATION

TRANSMISSION

ASSEMBLY

When

dismounting
the
automatic

transmission
from
a
car

pay
attention

to
the

following
points

I
Before

dismounting
the
trans

mission

rigidly
inspect
it

by
aid
of
the

Trouble

shooting
Chart
and
dis

mount

it

only
when
coll5idered
to
be

necessary

2

Dismount
the
transmission
with

utmost
care
and
when

mounting

observe
the

tightening
torque
indi

cated
on
another
table
not
to
exert

excessive
force

REMOVAL

In

dismounting
automatic
transmis

sion
from
car

proceed
as
follows

I

Disconnect

battery
ground
cable

from
terminal

2

Disengage
torsion

shaft
from
ac

eelerator

linkage

3

Jack

up
vehicle
and

support
its

weight
on

safety
stands
Recommend
a

hydraulic
hoist
or

open
pit
be

utilized

if
available

Make
sure

that

safety
is
insured

4
Remove

propeller
shaft

Note

Pl
ll
up
the

openina
in

the
rear

extension
to

prevent
oil
from

flow

ing
out

S

Disconnect
front
exhaust
tube

6
Disconnect
selector

ra
8e
lever

from

manual
shaft

7
Disconnect
wire
connections

at

inhibitor
switch

8

Disconnect
vacuum
lube
from

vacuum

diaphragm
and
wire
connee

tions

at
downshift
solenoid

9

Disconnect

speedometer
cable

from
rear
exlension

10
Disconnect
oil

charging

pipe

II

Disconnect
oil
cooler

inlet
and

outlet
tubes
al
transmission

case

12

Support

engine
by

locating
a

jack
under
oil

pan
with

a
wooden

block
used

between
oil

pan
and

jack

Support
transmission

by
means
of
a

transmission

jack
CAUTION

Do
not

plecs
the

jack
under
the
oil

pin
dnin

plug

13
Detach
converter

housing
dust

cover
Remove
bolts

securing
torque

converter
to
drive

plate

AT261

Fig
A
T
22

Removi
Torqu

Converter

Attachirrg
Bolt

Note
Before

toni
COD

v
ter
ICnlJe
match
mark
011
two

parts
10
that

they
may
be

replaced

in
their

original
position
at
sa

sembly

14
Remove
rear

engine
mount
Se

curing
bolts

and
crossmember
mount

i
8
bolts

IS
Remove
starter
motor

16
Remove
bolts

securing
transmis

sion
to

engine
After

removing
these

bolts

support
engine
and
transmission

with

jack
and
lower
the

jack
gradually

until
transmission
can
be
removed
and

take
out
transmission
under
the
ear

Note

P1
I
up
the

opening
such
u
oil

chergina
pipe
oil
cooler
tuba
etc

CAUTION

Take
cin
in

dismounting
tnnStnlllioA

not
to

strike

any
adjacent
paru

INSTALLATION

Ill5tallation
of
automatic
transmls

sian

on
car
is

reverse
order
of
removal

However
observe
the

following
in

stallation
notes

Drive

plate
runout

Turn

crankshaft

one
full
turn
and

measure
drive

plate
runout
with

indi

AT
25
eating
finger
of
a

dial

gauge
rested

against
plate

Maximum

ellowable
runout

0
5
mm
0

020
in

AT268

Fig
A
T
3

Me
uring
Drive
PIote

Runout

2
Installation
of

torque
converter

Line

up
notch
in

torque
converter

with
that
in
oil

pump
Be
extremely

careful
not
to
eause
undue
stresses
in

parts
In

inataIIing
torque
converter

AT116

Fig
A
T
24

Torqu
Converter

A

ligning
Cut

3
When

connecting

torque
con

verter
to
transmission
measure
dis

tance
A

10
be
certain
that

they
are

correctly
assembled

Distance
HA

Melre
irian
21

5
mm
0

846
in

A

AT117

Fig
AT
26

1116talling
Torque

Convert
r

4
Bolt
converter
to

drive
plate

Note

Align
chalk
mark

painted
a

cro5S
both

parts
during
disas

sembling
p

S
After
converter
is

installed
rotat

r
nkshait
veral
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
m
mual
and
selector
levers
in

N

8

Connect
inhibitor
switch
wires
Automatic
Transmission

NOte

a
Refer

to

page
AT40
for

Checking

and

Adjusting
Inhibitor
Switch

b

Inspect
end

edjust
switch
as

abo

whe
ever
it
has

to
be
removed
for

servi
e

9

Check
inhibitor

switch
for

op

eration

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
n

and
Ru

positions

Back

up

lamp
should
Iso

light

when
selector
lever
is

placed
in
R

position

10
Check
level
of
oil
in

transm

sion
For
detailed

procedure
see

page

AT39

AT

26
II
Move

selector
leve

through
all

positions
to
be

sure
that
transmission

operates
correctly

With
hand

brake

applied
rotate

engine
at

idling
Without

disturbing

the
above

seUlng
move
selector

lever

through
N

to
D
to
2

to
I

and
to

R
A

slight
shock
should
be

reU

by

handgripping
selector

each

time
transmission

is
shifted

Note
See

page
AT40
for

Checking

Engine
Idling
Revolution

12
Check

to
be
sure
that

line

pres

sure
is

correct
To
do
this
refer
to

page
AT
43
for
Line
Pressure
Test

13

Perform
stan
test
as
described
in

page
AT41

Note
If
difficulty
is
encountered
in

removing
retainer
direct

8

jet
of

air

toward
release

side

Ph

i

AT132

Fig
AT
40
Remov
I
Band
Servo

21

Pry
snap
rings
CD
from
both

ends
of

parking
brake
lever

@
and

remove
the

lever
Back
off
manual

shan
lock
nut

CID
and
remove
manual

plate
@
and

parking
rod

CID

Fig
AT

41
Rtmoving
Manual
Pl4tt

22
Remove

inhibitor
switch
and

manual
shaft

by
loosening
two
secur

ing
bolts

INSPECTION

Torque
converter

houslns

trensmlsslon
use
end

reer
extension

I

Check
for

damage
or

cracking
if

necessary
replace

2
Check
for
dents

or
score
marks

on

mating
surfaces

Repair
as
nee

essary

3
If

rear
extelUlion

bushing
is

worn

or
cracked

replace
it
an

mbly
of

bushing
and
rear
extension

housing
Automatic
Transmission

Geskots
end
Gorin

J

Always
use
new

gaskets
when
the

units

are
to
be
disassembled

2

Check
O

rings
for
burrs

or
crack

ing
If

necessary
replace
with
new

rings

011
distributor

I
Check
for

signs
of
wear
on

seal

ring
and

ring
groove

replacing
with

new
ones
if
found

worn

beyond
use

2
Check
that

clearance
between
seal

ring
and

ring
groove
is

correct
If
out

of

specification
replace
whichever
is

worn

beyond
limits

Clearence
1
n
58el

ring
end

ring
groove

0
04
to
0
16

mm

0
0016
to
0
0063
in

Clearance

Seal

ring

0
o
ii

J

0
1

FI

AT13

Fig
AT
42
Mea

uring
Seal

Ring

to

Ring
Groove
Clearance

ASSEMBLY

Assembly
is
in
reverse
order
of

disassembly
However
observe
the
fol

lowing
assembly
notes

After

installing

piston
of
low
and

reverse
Drake

assemble
thrust

spring

ring
return

spring
thrust
washer
and

one

way
clutch
inner

race

Tighten

hex
head
slotted
bolt

using
Hex

head
Extension
ST2SS7000J

ST2SS70000

Torque
Wrench

GG930JOOOO
and

Socket
Extension

ST2S490000

ST2SSI200J

AT
29
J
Tightening
torque

One

way
clutch
inner
race
to

transminion

case

1
3
to
1
8

kg
m

9
to
13

ft
b

ST25570001

h
ST25490000

GG9
30
10000

Fig
AT
43

1
lalli
ll
One

way

Clutch
Inner
Race

2
After
low

and
reverse
brake
has

been
assembled
measure
the

clearance

between

snap
ring
CD
and

retaining

plate
@
Select

proper
thickness
of

retaining
plate
to

give
correct

ring
to

plate
clearance

Low
and
revene
br
ke

de
r
nce

0
80
to
1
25
mm

0
031
to
0

049
in

Fig
A
T
44
Measuring
Ring
to

Plate
Clearance

Available

retaining
plete

Refer
to
Service
Oeta
and

Specifications

3

Install
one

way
clutch
so

that
the

arrow
mark
4
is
toward
front
of

vehicle
It
should
be

free
to
rotate

only
in
clockwise
direction

ITU

lmQO
d
fJ

AT137

Fig
A
T
45
One

way
Cluleh

4

After

installing
rear
extension

tighten
attaching
bolts
Place
manual

lever
in
P

range
and
check
to

be
sure

that

rear
outpul
shaft
is

securely

blocked

fl
Tightening
torque

Transmission
case
to
rear

extension

2
0
to
2

5

kg
m

14
to
18
fHbl

5

Tighten
servo
retainer

temporari

Iy
at
this

stage
of
assembly

6
Place
rear
clutch

assembly
with

needle

bearing
on
front

assembly

7

Install
rear
clutch

4
lb
and
front

planetary
carrier

AT142

Fig
AT
46

talling
Planetary

Carrier

8
Assemble

connecting
shell
and

other

parts
up
to
front
clutch
in

reverse
order
of

disassembiy

AT143

Fig
AT
47

talling
Canneetin

Shell
Automatic
Transmission

9

Adjust
total
end

play
and
front

end

playas
follows

Front
end

play

t

Zl

L

r

Total

end

play

AT138

Front

clutch
5

Transmission
ca5e

thrust

washer
6
Oil

pump
gasket

2

OH

pump
cover
7

Oil

pump
cover

3
Front

clutch

bearing
race

4

Rear
clu

tch

Fig
AT
48
End

Play

I
Measure
the
distance
A
and

C

by
vernier

calipers

I

I
Tran

mission
case

t

f

l

1
I
n
0

tic
r
1

A
W

I

I
II
clulch

I
N
ed1e

bearing

Bearing
lace

J

AT139

Fig
A
T
49

MeaSuring
the
Di
tance

A
and
C

2
Measure
the
distance
B
and

D
of

oil

pump
cover

B

AT140

Fig
A
T
50
Measuring
the
Di
tance

cB
and
n

AT
30
Adjustment
of
totel
end

pley

Select
oil

pump
cover

bearing
race

by

calculating
thc

following
formula

TT
A

B
W

where

T

T
Required
thickness
of
oD

pump

cover

bearing
race
mm
in

A

Measured
distance
A

mm
in

B
Measured
distance
B
mm
in

W

Thickness
of

bearing
race

temporarily
inserted
mm
in

A
vaDable
oil

pump
cover

bearing

race

Thickness
nun
in

1
2
0
047

I
4
0
055

1
6

0
063

1
8
0

071

2
0
0
079

2
2
0

Og7

Specified
totel

end

play

0
25
to
0
50

mm

o
oio
to
0

020
inl

Adjustment
of
front
end

pley

Select
front
clutch
thrust
washer
by

calculating
the

following
formula

T

F
C
D
0
2
mm

where

T

F
Required
thickness

clutch
thrust
washer

C

Measured
distance
C

D

Measu
red
distance
D

Available
front
clutch
thrust

washer
of
front

mm
in

nun
in

mm
in

Thickness

mm
in

1
5
0
059

I
7

0
067

1
9

0
075

2
1
0

083

2
3
0

091

2
5
0
098

2
7
0
106

Specified
front
end

pley

0
5
to
0
8

mm

0

020
to
0
031
inl

HT6100800

Fig
AT
75

Dilaaumbling

ValwBady

2

Remove

attaching
bolts
With

bolts
removed
lower
valve

body

separate
plate
and

upper
valve

body

are
free

for
rem
wl

CAUTION

00

not
IIlow

orifice
c111C1l
VIlv8

end

weIn

spring
In
1

nIn

body
to
be

I
and
lost
wilen

removinglllp

aratll

plata
Automatic
Transmission

Sf

3

Pull
out
manual
valve

4

Remove
side

plate
Take
out

Ist
2nd
shift
dve

2nd
3rd
shift

valve

pressure
modifier

valve
and

Wee
valve

springs

Fig
AT
77

Remouing
Manual
Vallie

r
p

g

1

Prasur
e

ul8t
m

g

qrJ
0

ew
o

afW
e

f
rio
UIiltOi

SeccQdJock

V81V
AT171

HT61000800

Fig
AT
78

Remouing
Bide
Plote

CAUTION

00
not
work
it
off
With

rivers

To
syoid

damaging
m
in8

screws
do

not
work
it
off

with
screwdriver

5
Remove
side

plate

pull
out

pres

sure

regulator
valve
second
lock
valve

pressure
regulator

plug
and
two
valve

springs

6
Remove
side

plate
With
side

plate
removed
solenoid
downshift

valve
throttle
back

up
valve

vacuum

throttle
valve
2nd
3rd

timing
valve

and
three
valve

springs
are
free
for

removal

2ncr
3fiftiming

2
Jd
3rd

shift
WiIVeL
q

SOJe
nod

00

ibiIi
aMi

P

iWWi
m
d
fiii
va
iOtt

tii
jJ
v

Fig
AT
79

ComponentaPartaofeontrol
Value

AT
36

Automatic
Transmission

Inspection

I
Check
valves
for

sign
of

burning
tension
if

necessary

replace
5

Check
oil

passages
in
valve

body

and
if

necessary
replace
4
Examine

for

any

sign
of

damage
for

sign
of

damage
and
other
condi

2
Check
to

be
certain
that

oil
or

score
marks
on

separate
plate
If
tions

which
might
interfere
with

prop

strainer
is
in

good
condition
If
found

left
unheerlcd
oil

will

bypass
correct
er
valve

operation

damaged
in

any
manner
discard
oil

passages
causing
many
types
of

6
Check
bolts
for

stripped
threads

3
Test
valve

springs
for
weakened
abnormalities
in
the

system
Replace
as

required

Valve

spring
chart

Mean
coil
Installed

Wiredia
No
of

Free

length

Valve

sprma

mm
in
dia

active
coil

mm
in
Length
Load

mm
in

mm
in

kg
lbl

Manual
detent
1
3
6
0
15
0
32
4

26
5
5
5

0
051
0
236
1
276
1
043
12
1

Pressure

regulator
1
2
10
5
13
0
43
0
23
5
2
8

0
047
0
413

1
693
0
925
6
2

Pressure
modifier
0
4

8
0
5
0
18
5
9
0
0
1

0
01
6
0
315
0
728
0
354
0

2

2nd
shift
0
6

6
0
f

16
0
32
0
16
0
0
625

1st

0
024
0
236
1
260
0
630
1
378

2nd
3rd
shift
0
7
6
2
18
0
41
0
17

0
1

40

0
028
0
244
1

614
0

669
3

09

2nd
3rd

timing
0
7
5
5
15
0
32
5
27
0
0
55

0
028
0
217
1
280
1
063

1
21

Throttle
back

up
0
8
6
5

14
0
36
0
18
8
1
92

0
031
0
256

1417
0
740
4

23

Solenoid
downshift
0
5
5
0
12
0
22
0
12
5
0
60

0
0217
0
197
0
866
0
492

1
32

Second
lock
0
55
5
0
16
0
33
5
21
0
0
60

0
0217
0
197

1
319
0
827
1
32

Throttle

relief
0
9
5
6

14
0
26
8
19
0
2
19

0
035
0
220
1

055
0
74g
4
83

Orifice
check
0
23

4
77
12
0
15
5
11

5
om

0
0091

0
lg78
0
610
0
453
0
02

Primary
governor
0
45
8
3
5
0
21
8
7

5
0
215

0
0177
0327
0
858
0
295
0
474

Secondary

governor
0
7
8
5
5
5
25
2

10
5
1
10

0
028
0
335
0
992

0
413
2
43

T
37

Place
the
vehicle
in
a

pit
and

by

sampling
the
lealeed
oil
deiermine
if
it

is
the

torque
converter
oil
The

torque

converter
oil
has

a
color
like
red
wine

so
it
is

easily

distinguished
from

engine

oil
or

gear
oil

Wipe
off
the

lealeing
oil
and

dust

and
detect
the

spot
of
ill

lell8e

nonflammable

organic
solvent
such
as

carbon
tetrachloride
for

wiping

Raise
the
oil

tcmperature
by

op

erating
the

engine
and
shift
the
lever

to
D

to
increase
the
oil

pressure

The
sp

Q
of
o
1

1I8
u

J1en
be

found
more

easily

Note
As

oil

leakage
from
the
breath

er
does
not
talee

place

except
when

running
at

high
peed
it

iSimpos

sible
to
ate
this

lealcage
with

vehicle

stationary

CHECKING
ENGINE
IDLING

REVOLunON

The

engine

idling
revolution
should

be

properly
adjusted

If
the

engine
revolution
is

too
low

the
e

gine
does
not

operate
smoothly

and
if
too

high
a

strong
shocle
or

creep
develops
when

changing
over

from
ON
to

Dn
or
R

CHECKING
AND

ADJUSTING

KICK

WN

SWITCH

AND

DOWNSH
FT

SOLENOID

When
the
Ieickdown

operation
is

not
made

properly
or
the

speed

chang

ingpoint
is
too

high
check
the
kick

down
switch
downshift
solenoid

and

wiring
between
them
When
the

igni

tion

Ieey
is

po
iti
ned
at
the
1st

stage

and
the
accelerator

pedal
is

depressed

deeply
the
switch

contact
hould

be

closed
and
the
solenoid
should
clicle
If

it
does

not
click
it

indicates
a
defect

Then
check
each

part
with
the

testing

inatrumen15
Auto
lT1atic

Transmissiqn

Fi
J
A
T
84
Down

ltift

Sole
id

Note
Watch
for
oil

leekage
from

tnnsmission
case

INSPECTION
AND

ADJUSTMENT
OF

MANUAL

LINKAGE

The

adjustmcnt
of
manual

linkage

i

equany
important
as

Inspection
of

Oil
Level
for
the
automatic
transmis

sion
Therefore

great
care

should
be

cxercised
oecause

incorrect

adjustment

will
result
in
the

breakdown
of
the

transmission

Inspection

pun
the
selector
lever
toward

you

and
turn
it
as
far
as
p
to

range

where
clicks
will
be
ell

by
the
hand

This
is
the

detent
of
manual
valve
in

the
valve

body
and
indicates
the

corrett

position
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

iion

plate
when
itis
released

CHECKING
AND
ADJUSTING

INHIBITOR

SWITCH

The
inhibitor
switch

lights
the

re

verse

lamp
in
the

range
R

of
the

transmission

operation
and
also
rotates

the

starter
motor
in

the

ranges
N

and
P

AT
40
i

j

tI

IlV

@

@

AT

I

Inhibitor
switch

2
Manual
shaft

3
Washer

4

Nut

5
Manual

plate

Fi
J
AT
85
Comtruction

of
Inhibitor

Switch
6
Nut

1

Washer

8

Inhibitor
wilch

9

Ran
q
Iect
lever

Check
w

ethcr
he
leverse

lal
1p

and

the
starter
motor

operate
nonnal

Iy
in
these

ranges
If
there
is

any

trouble
first
check
the

inkage
If
no

defect
is

fo
nd
in

the

Ii
leage
check

tlie

inhibitor
Swi
ch

Separate
the
manual

lever
from
the

remote
control
selector
rod
and
turn

the

range
select
lever
to
N

Note
In
the

position
N

the
slot
of

the

manual
shaft
is
vertical

Using
the
tester
check
the
two

black

yellow
BY
wire

from
the
in

hibitor
switch
in

the

ranges
N
and

p
and
the
two
red
blacle
RB
wires

in

the

lange
R
for

continuity
Turn

range
select
lever
in

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
30

on
both

sides
from
each
lever
set
line
How

ever
if
its

continuity
range
is

obvioUs

ly
u
nequal
on

both
sides

adjustment
is

required

If

any
malfunction
is

found
un

screw
the

fastening
nut
o
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

Iy
to
the

position
N

by
means
of

the

selector

leVer

When
the
slot
of
the

shaft
becomes
vertical
the
detent

worles
to

position
the
shaft

correctly

with
a

clicking
sound

Move
the
switch

slightly
aside

so

that
the

scie
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
mm
0
059
in
diameter

pin
into

the

holes
If
the

alignment
is

correct

fasten
the
switch

body
with
the
bolts

pull
out
the

pin
tighten
up
the
screw

in

the
hole
and
fasten

the
selector

lever
as
before
Check

the

continuity

pin
with
the
lesler
If

Ihe
malfunc

tion
still
remains

replace
the
inhibitor

switch

STALL
TEST

The

purpose
of
this
test
is
to
check

the
transmission
and

engine
for
trou

ble

by
measuring
the
maximum
num

bers
of
revoiutions
o
the

cngine
while

vehicle
is
held
in

a
stalled

condition

The
carburetor
is
in

fullthrollle

opera

tion
with
the
selector
lever
in

ranges

1
2
and
I

respectively
Com

pale
the
measured

results
with
the

standard

values

Components
to
be
tested
and

test
itelJUl

I

Clutches
brake
and
band
in
trans

mission
for

slipping

2

Torque
converter
for

proper
func

tioning

3

Engine
for
overall

properly

STAU

TEST
PROCEDURES

Before

testing
check
the

engine
oil

and

torque
converter

oil
warm

up
the

engine

cooling
w

ter
to

suitable
tem

perature
by

running
at
1
200

rpm
with

the

selector
lever
in
the

range
P

for

sevcral
minutes

Warm

up
the

torque

converter
oil

to
suitable

temperature

60
to
lOOoC

140
to
2120F

I

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

with
chocks

and

apply
the
hand

brake

Be
SIIre

to

depress
the
brake

pedal

firmly
with
the
left
foot
before
de

pressing
the

accelerator

pedal

3
Throw
the

selector
lever
into
the

range
11

4

Slowly

depress
the

accelerator

pedal
until
the

throttle
valvc
is

fully
Automatic

Transmission

opened
Quickly
read
and

record

the

engine
revolution

when
the

engine

begins
to
rotate

steadily
and
then

release
the
accelerator

pedal

5
Shift
the
selector
lever

to
N

and

operate
the

engine
at

approxi

mately
1
200
rpm
for
more
than
one

minute
to
cool

down
the

torque
con

verter
oil
and
coolant

6
Make
similar
staU
tests
in

ranges

2
I
and
R

CAUTION

The

dill
test

operstion
81

specified
in

i18m
4

should
be

I118de
within

fiv

lIeonds

If
it
tBkes
too

long
the

oil

If

and
the
cluti
hn
blllke

and
b
nd

elll

ly
I
Suf

ficient

cooling
time
should

be

given

r

eech
test
for
the
four

IlInges

0
Z
1
end
R

JUDGEMENT

High
stall
revolution

more
than

staitdard
revolution

If
the

engine
levolulion
in

stall

condi
ion
is

higher
than
the
standard

values
it
indicates

that
onc
or
more

clutches
in
the

transmission
are

slipping
and
therefore
no

further
test

is

required

For
the

following
abnormalities

the

respective
causes
are

presumed

High
rpm
in

all

ranges
low
line

pr
ssure

High
rpm
in
0

2
and
I

and

normal

rpm
in
6R

Rear
clutch

slipping

High
rpm
in
D

and
2
and

normal

rpm
in

One

way

clutch

slipping

High
Ipm
in
R

only
Front

clutch
or
low

and
reverse
brake

slipping

To

determine
which
is

slipping

front

clutch
or
low
and
reverse

brake

a
road

test
is

needed

If
while

coasting
after

starting

with
the
levcr
in
I

range
engine

braking
does
not

work

properly
the

low

and
reverse
brake
is

slipping

Otherwise
the
front
clutch
is

slipping

Slipping
of
the
band
brake
is
diffi

cuJt
to
ascertain

However
jf
it

occurs

with

the
lever
in
1

range
engine

AT
41
revolution
increases

up
to
the
same

level

as
in
1st

range
It

is

impossible

to

check
it
in
the

stall
test

2
Standard
stall
rnoluiion

If
the

engine
revoluiion
in

stall

ondition
is
within

he
standard

values
the
control
elements
are

nOf

mally

operating
in

the

ranges
D

2n
I

and
R

Also
the

engine
and
one

way

clutch
of
the

torque
converter
are

norinal
in

performance
and

operation

The

one

way
clutch

of
the

torque

converter

however
sometimes

sticks

This
is
determined

in
the
road

test

3

Lower

stall
revolution
than
lIand

ard

revolution

If

the

engine
revolution
in

stall

condition
is

lower
than
the

standard

values
it

indicates
that
the

engine
is
in

abnormal

condition
or
the

torque
con

verter
s
one

way
clutch
is

slipping

4
O
hers

I
If

the

accelerating
performance

is

poor
until
vehicle

speed
of

approxi

mately
SO

kmfh
30
MPH
is
attained

and
then
normal

beyond
that

speed
it

can
be

judged
that
the

torque
con

verte
c

s
one

way
clutch
is

slipping

2

If
the

torque
converter

sane

way
dutch
sticks

vehicle

speed
can

not

exceed

approximately
80

kmfh

SO
MPH
in
the

road
tesl

In
such

a

case
the

torque
converter

oil
tem

perature
rises

abnormally
and
so

special
care
is

required

3
If
the

transmission
does
not

op

erate

properly
at
all
vehicle

speeds
it

indicates

poor
engine
performance

ROAD

TEST

An

accurate

knowledge
of
the
au
to

matic

transmission
is

required
for
an

exact

diagnosis

II
is

recommended
that
a

diagnosis

guide
chart
with
the
standard

vehicle

speeds
for
each

stage
of

the

up
and

down

shiftings
be

prepared
Measured

vehicle

speeds
are
to

be
filled
in

the

adjoining
column
after
each

testing

Also
it

is
advisable
to

mount

a

stopper
for

positioning
the
throttle

opening

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

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