1973 DATSUN B110 clutch

I

CHASSIS

D

range
Top
gear

In
Jrd

gear

position
the
fornt
and

rear
dutches
are

applied
The

power

flow
takes

place
through
the

input

shaft
into
rear

dutch
drum
The
rear

clutch

drum
rotates
the
steel
drive

plates
of
the
rear
dutch
and
the
lined

drive

plates
of

the
rear
dutch
and
the

lined
drive

plates
of
the
fronl
clutch

The
rear

clutch
directs
the

power
flow

through
the
rear

clutch
hub

and
frunt

internal

gear
to
the
front

planet
car

rier

The
front
clutch

directs
the

power

now

through
the

connecting
sheU
to

the

sun

gear
With
the
sun

gear
and
the

rear
clutch
hub

driven
at

the
same

speed
the
front

planet

assembly
is

forced
to
rotate

the

output
shaft
at

the
same

speed
in
the
direction
to

provide
the

top
gear

When

the
car

speed
further
in

creases
while

running
at

02
range

2nd

gear
and

the

governor
pressore

I5
exceeds
the
combined

force
of

the

spring
of
the
2nd
3rd

shift
valve

@
and
the

throttle

pressure
19
the

2nd

3rd
shift
valve

@
moves
and

the

line

pressure
8
acts

to
release
the

front
clutch

and
band

servo

through

the

line

pressure
10
Fig
A
T
36
Power
transmission

during
D3

range

AT083

Fig
A

T
37

Operation
of
each
mechanism
D3

range

Clutch
Low
Band
servo
On

Parking

Range
c

w

ratio

Front
Rear

brake
Operalion
Release
c1ulCh
pawl

Park
00
on

Reverse
2
182
on
on
on

Ntulral

DI
low
2
458
on
on

Drive
D2
Second

1
458
on
on

OJ

Top
000
on
on
on
on

2
Second
1
458
on
on

12
Second
1
458
on
on

I

II
low
2
458
on
on

AT
24

CHASSIS

1

range
kick
down

lli1e

llperJling
JI

speeds
ht
Ii1

approximately
8U
to
90
km
h

50
to

56
i

1PII
J

kid
3rJ
2nJ
d0wnslllft

an
he
1

clllllplish
d

hy
fully
de

pressing
the
accelerator

A
kick
3rd
lsl
Of
nd
lst

downshift

can
also
be

accomplished

below

approximately
40
10
50
km
h

25
to
31
MPIl

When
kick
down
is

performed
the

push
rod

operates
by
the
solenoid

the

valve
is

depressed
downward
and
the

circuit

from
the
line

pressure
7
to

the
line

pressure
13

opens
The
line

pressure
IJ

3
plus
the
force
of
the

2nd
Jrd

shift
valve

spring
oppose

the

governor
pressure
15
at

the

2nd

Jrd
shift
valve

4
and
thus

performs
Jrd
2nd
downshift

op

eration

Moreover
the
line

pressure
13

plus
the

force
of
the
I
st

2nd
shift

valve

spring
oppose
the

governor
pres

sure

15
at
the
I

st
2nd
shift
valve

@
and
thus

perform
Jrd
2nd
or

2nd

I
downshift

operation
Clutch
Ln
l

BJ
nd
Cr
o
o
On

Park

ing

Ge

Range
reverse
way

pawl

rat

Fronl
Real
brake
Operalion
R
lea

c1ulch

Park
on
on

Re
erse
2182
n
on
on

Neulral

01
low
2
458
on
on

Orive
Dl
Second
1
458
on
on

OJ

Top
1
000
on
on
Ion
on

1
Second
1
458
on
on

tl
Second
1
458
on
on

t

low
2
458
on
on

AT
26

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

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

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

TRANSMISSIO
N

i

MAJOR
REPAIR
OPERATION

SERVICE
NOTICE
FOR
DISASSEMBLY

AND
ASSEMBLY

TORQUE
CONVERTER

Inspection

TRANSMISSION

Disassembly

Inspection

Assembly

SERVICE
NOTICE
FOR

DISASSEMBLY
AND

ASSEMBLY

I
It
is

desirable
that
the

repair

operations
are
carried
out
in
the

dust

proof
room

2
Due
to
the
differences
of
the

engine
capacities
the

specifications
of

component
parts
for
each

model

s

transmission

may
be

different
How

ever

they
do
have
common

adJust

ments
and

repair
as
well

as

cleaning

and

inspection
procedures
ou

tlined

hereinafter

3

During
the

repair
operations

refer
to
the
Service
Data
and

Specifi

cations
section
for
the
correct

parts

for
the

applicable
model

transmission

4
Before

removing
any
of
subas

semblies

thoroughly
clean
the

outside

of
the
transmission
to

preven
t
dirt

from

entering
the
mechanical

parts

5
Do
not
use
a
waste

rag
Use

a

nylon
waste

or

paper
waste

6
After

disassembling
wash
all
dis

assembled

parts
clean
and
examine

them

to
see
if
there
are

any
worn

damaged
or
defective

parts
and
how

they
are
affected
Refer

to
Service

Data

for
the
extent
of

damage
that

justifies
replacement

7

Packings
seals
and
similar

parts

once
disassembled
should
be

replaced

with
new
ones
as
a
rule

TORQUE
CONVERTER
CONTENTS

AT
37

AT
37

AT
37

AT
37

AT
37

AT
39

AT
39
COMPONENT
PARTS

F
rant
clutch

Rear
clutch

Low
reverse
brake

Servo

piston

Governor

Oil

pump

Planetary
carrier

Control

valve

The

torque
converter
is
a
welded

construction
and
can
not
be
disas

sembled

Inspection

I
Check

torque
converter
for

any

sign
of

damage

bending
oil
leak
or

deformation
If

necessary
replace

2
Remove
rust

from

pilots
and

bosses

completely

If

torque
converter
oil
is

fouled
or

contaminated
due
to
burnt
clutch

flush
the

torque
converter
as
follows

I

Drain
oil
in

torque
converter

2
Pour
none
Iead

gasoline
or

kero

sene
into

torque
converter

approxi

mately
0
5

liter
I
1

8
V
S

p
7
8

Imper
p

3
Blow
air

into

torque
converter

and
flush
and
drain
out

gasoline

4

Fill

torque
converter
oil
into

torque
converter

approximately
0
5

liter
I
i
8
I

pt
7
8

lmper
pt

5

Again
blow
air
into

torque
con

verter
and
drain

torque
converter
oil

TRANSMISSION

Disassembly

I
Drain

oil
from
the
end

of
rear

extension
Mount
transmission
on

Transmission
Case
Stand
ST07860000

or
ST07870000
Remove

oil

pan
See

Figure
AT
52

AT

37

T
AT
41

AT
41

AT
42

AT
43

AT
43

AT

44

AT
44

AT
45

AT
45

2
Remove
bolts

securing
converter

housing
to
transmission

case
Remove

torque
converter

3
Remove

speedometer
pinion

sleeve
boll

Withdraw

pinion

4

Turn
off

by
hand
downshift
sole

noid
and
vacuum

diaphragm
Do
not

leave

diaphragm
rod
at

this

stage
of

disassembly
Rod
is

assembled
in

top

of

vacuum
diaphragm
See

Figure

AT
53

ST07860000

AT118

Fig
AT
52

Remouing
oil

pan

Show
2
liter
engine
model

Fig
A
T

53
Downshift
solenoid
and

uacuum
diaphragm

I

J

It

r

I

x

f

Fig
AT
54

Remouing
valve

body

tt

l

v

AT121

Fig
A
T
55

Loosening
band
en
a

Fig
AT
56

Removing
oil

pump

AT123

Fig
A
T
5
7

Removing
band
strut

Fig
A

T
SS

Removing
connecting
shell
CHASSIS

5
Remove

bolts
which
hold
valve

body
to
transmission
case
See

Figure

AT
54

6
Loosen
lock
nut

2
on

piston

stem

CI
as

shown
in

Figure
AT
55

Then

tighten
piston
stem
in
order
to

prevent
to
fall
front

clutch
drum
down

when
oil

pump
is
withdrawn

7

Pull
out

input
shaft

8
Withdraw
oil

pump
using
Sliding

Hammer

S125850000
Exercise
care

not
to
allow
front
clutch
to
come
out

of

position
and

drop
onto
floor
See

Figure
AT

56

9

Remove
band

strut
This
can
be

done

by

loosening
piston
stem
further

See

Figure
AT
57

10
Remove
brake
band
front

clutch
and
rear

clutch
as
an

assembled

unit

11

Remove

connecting
shelt
rear

clutch

hub
and

front

planetary
carrier

as

a
unit
See

Figure
AT
58

12

With
the

aid
of

Snap
Ring
Plier

HT69860000

pry

snap
ring
off

output

shaft

See

Figure
AT
59

13

Remove

connecting
drum
and

inner

gear
of
rear

planetary
carrier

as

an

assembly
See

Figure
AT
60

14

Remove

snap

rings
and

then

remove
rear

planetary
carrier
internal

gear
connecting
drum

one

way
clutch

outer

race
and
one

way
clutch
in

this

written

order

15
Remove

rear
extension

loosen

ing
securing
bolts

See

Figure
A
T
6I

16
Pull
out

output
shaft
remove
oil

distriburor

2
together
with

governor

valve
D
See

Figure
AT
62

17

Pry
off

snap
ring
using
a

pair
of

pliers
Remove

retaining

plate
drive

plate
driven

plate
and
dish

plate
in

this
written
order
See

Figure
AT

63

AT
38
Fig
AT
61

Removing
rear

extension

I
AT128

Fig
A
T
62

Removing
governor
and

oil
distributor

AT129

Fig
A

T
63

Removing
drive
and

driven
plates