1973 DATSUN B110 lock

CHASSIS

D

range
2nd

gl
ar

In
this
case
the
rear
dutch
is

applied
and
the
band
brake
holds
the

front
dUh
h
drum

i
onnel
ting
shell

and
sun

gear
from

rotating

The

power
now
takes

place
through

the

input
shaft
into
the
rear

dutch
and

the
front
internal

gear
WHh
the
sun

gear
held

stationary
the

fronr

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
shafr

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
rotation
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

clutch
will

act
to
allow
the
clockwise

rotation

of

connecting
drum

When
the
car

speed
increases
while

running
at
D

range
1st

gear
the

st

2nd
shift
valve

4
moves
al

lowing
the

line

pressure
I

to
be

introduced
into
the

line

pressure
8

through
itself
The
line

pressure
8
is

further
led

to
the
line

pressure
9

through
the
second
lock

vaIve@
and

by
locking
the
band

servo
obtains
the

2nd

gear
condition
Fig
A
T

33
Power

transmission

during
D2

range

I

r

J

ITMi

A

T079

Fig
A
T

34
Operation
of
each
mechanism

during
D2

range

C
w
Clutch
low

Band
selva
On

Parking

Range

ratio
reverse
w

y

pawl

Front
Rear

brake
Operation
Rdea5e

clutch

Park
on
on

Reverse
2
182
on
on
on

Ne
ulral

01
low
2
458
on
on

Drive
01

Second
1
458
on
on

OJ

Top
000
on
on
on
on

1
Se
cond
458
on
on

11
Second
1
458
on
on

low
1
458
on
on

AT
22

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

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

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

18

Reaching
through
back
side
of

transmission

case
remove
hex
head

slotted
bolts
as
shown

in

Figure

AT
64
To

do
this
use
Hex

head
Ex

tension

ST25570000
One

way
clutch

inner
race
thrust

washer

piston
return

spring
and
thrust

spring
ring
can
now

be

removed

19
Blowout

low
and
reverse
brake

piston
by
directing
a

jet
of
air
into

hole
in

cylinder
See

Figure
A
T

65

20
Remove
band

servo

loosening

attaching
bolts

Note
If

difficulty
is
encountered
in

removIng
retainer

direct
a

jet

of
air

toward
release
side
as

shown
in

Figure
AT
66

ST25570000

Fig
A
T

64

Removing
hex
head
lotted

bolt

Fig
A
T
65

Removing
pi
ton

r

AT132

Fig
A

T

66

Removing
band
seroo
AUTOMATIC
TRANSMISSION

21

Pry
snap
rings
CD
from
both

ends
of

parking
brake
lever

@
and

remove
the

lever
Loosen
off
manual

shaft
lock

nut

CID
and
remove
manual

plate
@
and

parking
rod

@
See

Figure
AT
67

Qd

i
f

W
II

4

i

n
n

r
1

K
j

e
0

H
o

i

j
j

I
j

l

m
r
JlII

2

U
r

K
F

J

r

0

f
1

r

AT133

Fig
A
T
67

Removing
manual

plate

22
Remove

inhibitor
switch
and

manual
shaft

loosening
two

securing

bolts

Inspection

Torque
converter

housing

transmission
case
and
rear

extension

1
Check
for

damage
or

cracking
if

necessary
replace

2
Check
for
dent
or
score
mark
on

their

mating
surfaces

Repair
as

neees

sary

3

Check
for
score
mark
or

sign
of

burning
on
extension

bushing
if

neces

sary

replace

Gaskets
and
O

ring

1

Always
use
new

gaskets
when
the

units
are

to
be

disassembled

2

Check
O

rings
for
burrs
or

cracking
If

necessary
replace
with

new

rings

Oil
distributor

I

Check
for

sign
of
wear
on

seal

ring
and

ring
groove
replacing
with

new

ones
if

found
worn

too

badly

beyond
use

2
Test
if

clearance
between
seal

ring

and

ring
groove
is

correct
If
out
of

specifications

replace
whichever
worn

excessively
beyond
limits
Correct

clearance
is
from
0
04
to
0

16

mm

0
0016
to
0
0063
in
See

Figure

AT

68

AT
39
Clearance

Seal

ring

F
1
I

i
h

AT134

Fig
A
T

68

Measuring
seal

ring
to

ring
groove
clearance

Assembly

Assembly
is
reverse
order
of
dis

assembly
However
observe
the

following
assembly
notes

1
After

installing

piston
of
low
and

reverse
brake
assemble
thrust

spring

ring
return

spring
thrust
washer

and

one

way
clutch
inner

race

Torque

hex
head

slotted
bolt

to
1
3

to
1
8

kg
m
94
to
13
ft
Ib

using
Hex
head

Extension

ST25570000

Torque

Wrench

GG930
1

0000
and
Socket
Ex

tension
ST25512001
See

Figure

AT
69
i

ST25570000

ST255
1

2001

GG93010000
0

rr

l

f

r

Fig
A
T
69

Installing
one

way
clutch

inner
race

2
After

low
and

reverse
brake
has

been
assemble

measure
the
clearance

between

snap

r
ng
cD
and

retaininig

plate
@
Select

proper
thickness
of

retaining
plate
that

will

gi
ve
correct

ring
to

plate
clearance

See

Figure

AT
70

Low
and

reverse
brake

clearance
0
8
to
1

05
mm

0
031
to

0
041
in

Fig
AT

70

Measuring
ring
to

plate

clearanc

Available

retaining
plate

No

Thickness
mm
in

I

15
8
0

622

2
16
0

0
630

3
16
2
0

638

4
16
4
0
646

5
16
6
0

654

6
16
8

0

661

As

to

inspection

procedure
for
low

and
reverse
brake
see

page
AT
43

3

Install
one

way
clutch

so
that
the

arrow

mark
is

toward
front

of

vehicle
It

should
be

free
to

rotate

only
in

clockwise
direction
See

Figure

AT71

AT131

Fig
AT
71
One

way
clutch

4

After

installing
rear

extension

torque
attaching
bolts
to
2

0
to
2
5

kg
m
14
to

18
ft
lb
Place
manual

lever
in
P

range
and
check
to

be
sure

that

rear

output
shaft
is

securely

blocked

5

Tighten
servo
retainer

temporari

Iy
at

this

stage
of

assembly
CHASSIS

6
Place
rear

clutch

assembly
with

needle

bearing
on
front

assembly

7

Install
rear

clutch
hub
and

front

planetary
carrier
in
the
manner
as

shown
in

Figure
AT
72

AT142

Fig
AT

72

Installing
planetary
carrier

8

Assemble

connecting
shell

and

other

parts

up
to
front
clutch
in

reve
e
order
of

disassembly

ATl43

Fig
AT
73
In

talling
connecting
hell

9

Adjust
total
end

play
and
front

end

playas
follows

L

@
8

S

I
fT

15

l

r

1
Front
clutch

thrust

washer

2
Oil

pump

3
Front
clutch

4

Rear
du
tch
S
Transmission
case

6
Oil

pump

gasket

7

Oil

pump
cover

bearing
race

Fig
AT
74

Endplay

AT
40
I
Measure
the
distance
A

and

e

by
vernier

calipers
as
shown
in

Figure
AT
75

fl
l

I
Transmission
case

1l

Lf
ar
n
h

AT139

Fig
AT
75

Measuring
the
diltance

A
and

C

2
Measure
the
distance

B

and

D

of
oil

pump
COVer
as
shown
in

Figure
AT
76

B

AT140

Fig
AT
76

MeaJIuring
the
diltanc

B
and
D

Adjustment
of
total

end

play

Select
oil

pump
cover

bearing
race

by

calculating
the

following
formula

TT
A
B
W

where

TT
Required
thickness
of
oil

pump

cover
bearing
race
mm
in

A

Measured
distance
A

mm
in

B
Measured
distance
B
mm
in

W

Thickness
of

bearing
race
tem

porarily
inserted
mm

in

Available
oil

pump
cover

bearing
race

No
Thickness

mm
in

I
1
2

0
04
7

2
I

4
0
055

3
1

6
0
063

4
1

8
0
071

5

2
0
0
079

6
2
2

0
087

Specified
total
end

play

0

25
to

0
50
mm

0
009
to
0

020
in