DATSUN B110 1973 Service Owner's Guide

AUTOMATIC
TRANSMISSION

I
ran
e

kick
down
shift
valves
in
2nd

gear
position

iQ
Front

ClutCh
L
llIR

B
ilk

8

e

Downshift

Solenoid
Torqu
Con
t

Q

I

Throttle

Back

up

V
lv
II

iftY

h
TIC
0

A

lV

A
Lubl
tion
e

S
lO

lID
VK

Th
o
I

V
v
8
Sol

Dow

Dr

I

V
I

F
lt

Lubrice

D

Yo

t
Otific

Check

0

Throttle

Dr
n

V

mm

OJ

12

Q
ht
2rod
hif
v

S

C
Ptenu

R
ul

to
Vel

8

Menu

0

PRND2

I
L
J

Jl

No
Me
klld
er
D
in

SKond
Prim

GO
no
0

1
Go
no

V
LIne

pr
s

100
0
l
d
p
1

Goy
rno

p
eslU

s
Torque
con
er
r

pr

Th
oUl

prnsu

Fig
A
T
39
Oil

pressure
circuit
diagram
D

range
kick

down

shift
valves
in
2nd

gear
position

AT
27

CHASSIS

2

range
2nd

gear

In
2

range
the

gear
ratio
is
locked

to
the
2nd

forward

speed
In
this
case

the
rear

clutch
is

applied
and
the
band

brake
holds
the

front
clutch
drum

connecting
shell

and
sun

gear
from

rotating

The

power
flow

takes

place
through

the

input
shaft
into
the

rear
clutch
and

the

front
internal

gear
With
the

sun

gear
held

stationary
the
front

plane

lacy
gears
rotate
around
the

sun

gear

carrying
the

front

planet
carrier
with

them
The
front

planet
carrier

being

splined
to
the

output
shaft

causes

clockwise

rotation
of
the

output
shaft

at
a
reduced

speed
compared
with
the

speed
of
the

input
shaft
with

an

increase
in

torque
As
the
low
and

reverse
brake
is
not

applied
the
clock

wise
mlation
of
the

output
shaft

causes
clockwise
rotation
of
rear
inter

nal

gear
and
the
rear

planet
carrier

also

rotates
around
the

sun

gear
in
a

clockwise
direction
The
one

way

c1urch
will
act
to

allow
the
clockwise

rotation
of

connecting
drum

When
the

manual
valve

CV
is

posi

tioned
at
2
the
line

pressure
7
is

introduced
into
the
line

pressure
cir

cuits
I
2
and
4
The
line

pressure

I
is
led
to
the

governur
rear
dutch

and
Ist
2nd

shift
valve

ID
as
in
the

case
of
D

range
The
line

pressure

2
locks
the
second
lock
valve

@
and

is
led
to
the

tightening
side

of
the

band
servo

The
2nd

gear
is

therefore
fixed

regardless
of
the
car

speed
When

DJ
range
3rd

gear
is
shifted
to

2

range
the
line

pressure
4
enters
the

throttle
back

up
valve
IJ
and

produces

a

high
pressure
in

the
circuit
17

increasing
the
throttle

pressure
16

The

line

pressure
7
is

therefore

increases
and

quickly
tightens
the

band

Note

DJ
range
3rd

gear
to
2

range

If

DJ
range
3rd

gear
is

shifted
to
2

range
during

operation
the
manual

valve

CV

is
also
shifted
to
2

position
Fig
A

T
40
Powu
transmission

during
2
range

f
IY

9
3

AT079

Fig
A
T
41

Operation
of
each
mechanism

during
2

range

Gear
Clutch
low
Band
servo
On

Parking

Range

ratio
w

pawl

Front
Rear

brake
Operation
Relea
se

clutch

Park
on
on

Reverse
2
182
on
on
on

Neutral

I
t
Low
2
4S8
on
on

Drive
1
2
Second
1
458
on
on

1

Top
t
OOO
on
on
on
on

2
Second
1
458
on
on

12
Second
1
458
on
on

t

tt
Low
2
458
on
on

causing
the
line

pressure
circuit

3
to
be

drained
Therefore

the
line

pressure
circuit
10

which
is

situated
at
the

release

side

of
the
front

clutch
and

senro

is
also
drained

through

the
2nd
3rd
shift

valve

@

forcing
the

speed
to
decrease
from
3rd

gear
to
2nd

gear

In
this
case

the

speed

change

quickly
takes

place
because
the

line

pressure
7
and
other

pres

sure
are

heightened
by
the

action
of
the
line

pressure
4

in
the
same
manner
as
de

scribed
under
2

range

AT
28

AUTOMATIC
TRANSMISSION

2

range
2nd

gear

To

queCo
Low
a

R

8

ka

8
ke

Oownltlift

Solenoid

14

12

@
VK

Throt

V

I
7
Throttl

Sack

up

V
lv
@SOl

o
if
V
I

Front

Lubrk
n

Orltlc

Ch
k

V

l
Dr
n
V

1

ThroW

Drain

V
Ye
Pt

Mod
fier
V
I

IS

8Rt

@2
3rdTimi
Sl

It

V

12

3
ht
2nd

Sf
ll

5

Secor
d
Lock
V
I

3
I

@
M
nu
l

V

I

5
I1Jl
ill
Pr
ur

R
vulatO
V
I

Note
M

keel
r
D

in

a

P

imary

Go
no
V
h
Line

pr

IGo
no

teed
p
luure

Go

no
p

E2I
B
Ii
iiiIJ
To

c
U
con

t
p

Th
oUl

prn
SecOnda

y

00
0

V
lv

Fig
AT
42
Oil

pressure
circuit

diagram
2

range
2nd

gear

AT
29

CHASSIS

1

range
Low

gear

When

starting
in
I

range
the

driving
gear
is
locked
to
the
low

gear

ratIO

In
1

range
the

reaT
dutch

is

applied
and
the
low
and
reverse
brake

holds
the

connecting
drum
and

rear

planet
carrier
from

rotating
The

power
flow
takes

place
through
the

input
shaft
and
into
the
rear
dutch

Rotation

of
the
rear
clutch
drives
the

rear
clutch
hub

and
front
internal

gear

The
front
internal

gear
rotates
the

front

planetary
gears
clockwise
to

cause

the
sun

gear
to
rotate
counter

clockwise

Counterclockwise
rotation
of
the

sun

gear
turns
the
rear

planetary
gear

clockwise

The
rear

planet
carrier

splined
to

the

connecting
drum
is
held
from

rotating
by
the
low
and

reverse
brake

The
clockwise
rotation
of
the
rear

planetary
gears
therefore
rotates
the

rear
internal

gear
and

internal
drive

tlange
The

internal
drive

tlange
is

splined
to
the

output
shaft
and
rotates

the

output
shaft
clockwise
However

the

output
shaft
rotates
at
a

lower

speed
compared
with
that
of
the

input

shaft
This
is

caused

by
the
fact
that

the
front

planet
carrier
rotates
at
the

same

speed
as

the

output
shaft
in
the

same
direction
since
the
carrier
is

splined
to

the

output
shaft
The

front

internal

gear
and

planetary

gear
as

sembly
are

rotating
in
the

same
direc

tion
but
the

planet
carrier
is

rotating

at

a

speed
slower
than
the

ring
gear
So

the

gear
ratio

of
this

speed
range
is
a

combination
of
the
ratios

provided
by

the
front
and

rear

planetary
gear
a

semblies

When

the
manual
valve

CV
is

posi

tioned
at
I
the
line

pressure
7
is

applied
into
the

line

pressure
circuits

I
4
and
5
The

oil

pressure
in
5

actuates
the

low
and

reverse
brake

after

being
introduced
into

the
circuit

12

through
the

lst
2nd
shift
valve

@
and

the
line

pressure
I

acts
on
i

C

AT076

Fig
A
T

43
Power
transmission

during
11

range

A

Ton

Fig
A

T
44

Operation
of
each
mechanism

during
11
range

Clutch
Low

Band
rvo
On

Parking

Range
Gm

ratio
reverse
w

pawl

Front

Rear

brake
Operation
Release

clutch

Park
on
on

Reverse
2
182
on
on
on

Neutral

DI
low
2
458
on
on

Drive
D2
Second
1
458
on
on

D

Top
1
000
on
on
on
on

2
Second
1
458
on
on

12
Second
1
458
on
on

I

Low
2
458
on
on

the

rear
clutch
and

governor
The
line

pressure
4
acts
in

the
same
manner
as

in
2

range

Similar
10
that
of
the
D

range

the
line

pressure
increases
with
the

degree
of

depressiun
of
the
accelerator

pedal
and
the
line

pressure
decreases

with
the
increase
of

car

speed
The
governor
pressure
IS
which
acts
on

the
Ist
2nd

shift
valve
does

not

increase
until

it
overcomes
the
com

bined

force
of
the

line

pressure
12

and
the

spring

causing
nu
I

st
2nd

speed

change

AT
3D

AUTOMATIC
TRANSMISSION

1

range
Low

gear

Lo
Rev

B
k

Brat

Oownthift

SolenoOCl

14

T
COUP

A
uu
e

IV
hl

I

R
L
ub
c
tlon

Dr
n

It

Val
9
10
v

nHOI

V

l
in

jl

8
Sale
d

QI

Cow
ilt
V

D
nV
Front

Lubtlc
t
Oritice

ChotCk

Valv
I

I

14
Throttle

Dr

V
lv8
I

Pre

Modil
lv8

15

3
151
2nd

j
Pre
u

Re1julato
Valva

@

n

No
Marked
er
0
8in

Primary

Gove
nor
V

I
Line

p
Go
erno
feed

p
euu

GOvernor

preuu

lEII
IIIII
To

que
con
8

t8
pres
He

Th
ottl

p
Second

Go
l
Io
vel
8

Fig
A
T
45
Oil

pressure
circuit

diagram
11

range
Low

gear

AT
31

CHASSIS

1
rang
nd

gear

rOto
Con

I

Fro

l
ubHCll

II

1
Y

I

W

t
I

r

G
p

u

Reg
lle10
Ve

O
II
F
onl

Clutch
L
0Yw
r

e
e
e

a

eke

I

v

Th
o

Vel

O
f
e

ell
II

Vel

ThrOttle

0

v
31
J

lI
2
P
MP

M

lc
I

10

JCJ

rll

ZZ

I

IS

@2nd
3tdTlm
1J

V
h
@2nd3
d
ShIff

V

2
N

t
it

S
Of
d
L
ock
V
h

3
I
12

3
ht
2nd

6

6

lL

II
g
Mon

V

I

I
III

lIA
k
t
O
in

Hf
i

P
y

Gov
no
Vel
e
L
ne

pr
Go

no
feed

gt
Hu

ecOncl
y

00

0
Vel

Go
no

p
us
ur

TO

Qu
cony

g

Th
onlepr
swr

Fig
A
T
46
Oil

pressure
circuit

diagram
Iz

range
2nd

gear

AT
32

AUTOMATIC
TRANSMISSION

REMOVAL
AND
INSTAllATION

TRANSMISSION
ASSEMBLY

Removal

Installation

TRANSMISSION

ASSEMBLY

When

dismounting
the
automatic

transmission
from
a

vehicle

pay
at

tention
to
the

following

points

1

Before

dismounting
the

trans

mission

rigidly

inspect
it

by
aid

of
the

Troubleshooting
Chart
and
dis

mount
it

only
when

considered
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

vehicle

proceed
as
follows

i

Disconnect

battery
ground
cable

from
terminal

2
Jack

up
car
and

support
its

weight
on

safety
stands

Recommend
a

hydraulic
hoist
or

open
pit
be

utilized

if
available

Make

sure
that

safety
is
insured

3
Remove

propeller
shaft

Note

Plug
up
the

opening
in
the
rear

extension
to

prevent
oil

from

flowing
out

4

Disconnect
front

exhaust
tube

5

Disconnect

selector

range
lever

from
manual
shaft

6

Disconnect
wire
connections

at

inhibitor
switch
CONTENTS

AT

33

AT

33

AT

33
TRANSMISSION

CONTROL
LINKAGE

Removal
and
installation

Adjustment
AT

35

AT

36

AT

36

7

Disconnect
vacuum
tube
from

vacuum

diaphragm
and

wire
connec

tions
at

downshift
solenoid

8

Disconnect

speedometer
cable

from
rear

extension

9
Disconnect
oil

charging

pipe

10

Support
engine
by
locating
a

jack
under

oil

pan
with
a
wooden

block
used

between
oil

pan
and

jack

Support
transmission

by
means
of
3

transmission

jack

11
Detach

converter

housing
dust

cover
Remove

bolts

securing
torque

converter
to

drive

plate
See

Figure

AT
47

AT265

Fig
AT
47
Removing
torque
converter

attaching
bolt

Note
Before

removing
torque
con

verter
scribe
match
marks
on

two

parts
so
that

they
may
be

replaced
in
their

original
posi

tions
at
assembly

12
Disconnect

engine
moun
t

and

hand
lever
bracket

by

removing
two
2

rear

engine
mount

securing
bolts
and

two

2
crossmember

mounting
bolts

13
Remove

starter
motor

14
Remove
bolts

securing
transmis

sion
to

engine
After

removing
these

AT
33
bolts

support
engine
and
transmission

with

jack
and
lower
the

jack
gradually

until

transmission
can

be
removed
and

take

out
transmission

under
the

car

Note

Plug

up
the

opening
such
as
oil

charging

pipe
rear
extension

etc

Installation

Installation
of
automatic
transmis

sion
on

vehicle
is

reverse
order
of

removal

However

observe
the
follow

ing
installation
notes

Drive

plate
mnout

Turn

crankshaft
one
full

turn
and

measure
drive

plate
mnou
t
with

indi

cating

finger
of
a
dial

gauge
rested

against
plate
See

Figure
AT48

Replace
drive

plate
if

in

excess
of

0
5
mm

0
020
in

Maximum
allowable
mnout

0
3

mm
0
012
in

A

T266

Fig
A
T
48

Measuring
drive

plate

runout

2
Installation
of

torque
converter

Line

up
notch
in

torque
converter

with
that
in
oil

pump
Be

extremely

careful
not
to

cause
undue
stresses
in

parts
in

installing
torque
converter

See

Figure
A

T
49

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
TRANSMISSION

TRANSMISSION
CONTROL
LINKAGE

p
R
N

D

l

l

@

AT
35
@

1
Hand
lever

2
Hand
lever
bracket

3
Trunion

4
Cross
shaft

5

Adjust
nut

6

Upper
shift
rod

7
Cross

shaft

support

8
Hand
lever

shaft

9
Lower

shift
rod

10
Selector

range
lever
3

CD

CV

L

I

@

AT268

Fig
AT
51
Controllinhage
system

Removal
and

installation

I

Disconnect
control
knob
from

hand
lever

by
removing
a
screw

Remove

console
box

Disconnect
shift
rod

from
cross

shaft

4
Remove

hand
lever

hand
lever

shaft
and
shift
rod

assembly
with

bracket

To

install
reverse
the

order
of

removal
CHASSIS

Adjustment

The

adjustment
of

linkage
is

as

important
as

Inspection
of
Oil

Level

for
the
automatic

transmission

Therefore

great
care
should

be

exercised
because
defective

adjustment

will

result
in

the
breakdown
of

the

transmission

Loosen

adjust
nuts

@
See

Figure
AT

51

2
Set
hand

lever

CD
and

selector

range
lever

@
at
N

position
See

Figure
AT
51

AT

36
3

Set
lower

shift
rod

@
to

trunnion

@
by

turning
in
or

out

adjust
nuts
See

Figure
AT
I

After

adjusting
make
sure

that

hand
lever
can
be

set
in

any
position

correctly
and
that
hand
lever

operates

properly
without

any

binding

If
levers
do
not

operate
satisfactori

ly

readjust
or

replace
parts
as
neces

sary