1973 DATSUN B110 torque

R

range
Reverse

In
R

range
the

front
clutch

and

low
and

reverse
brake

are

applied
The

power
flow
is

through
the

input
shaft

front

clutch

connecting
sheU
and
to

the

sun

gear
Clockwise
rotatiun
of
the

sun

gear
causes

counterclockwise

rotation

of
the
rear

planetary
gears

With
the

connecting
drum
held
sta

tionary
by
the
low

and
reverse
brake

the
rear

planetary

gears
rotate
the
rear

internal

gear
and

drive

flange
counter

clockwise
The
rear
drive

flange

splined
to
the

output
shaft
rotates

the

output
shaft
counterclockwise
at
a

reduced

speed
with
an
increase
in

torque
for
reverse

gear

J

When
the

manual
valve

V
is

posi

tioned

at
R

range
the
oil

having
the

line

pressure
7
is

directed
to
the
line

pressure
circuits

5
and
6
The

pressure
in

the
circuit

ID
actuates

the

low

and
reverse
brake
after

being

introduced
into

the
line

pressure
cir

cuit

I2

through
the
lst

2nd
shift

valve

ID
The

pressure
in

the

circuit

operates
the
release
side
ofband

servo

and
the
front
clutch
after

being
led

to

the
line

pressure
circuit

10

through

the
2nd

3rd
shift
valve

@
The

throttle

pressure
16
and
the

line

pressure
6
which

vary
with
the

degree
of
the

depression
of
accelerator

pedal
both
act
on

the

pressure
regula

tor
valve

CD
and

press
its
valve

CD

increasing
the
line

pressure
7
In
R

range
the

governor

pressure
is
absent

making
all
sllch
valves

inoperative
as

the
lst
2nd

shift

valve

@

2nd
3rd
shift
valve
and

pressure

modifier
valve

@
CHASSIS

R

C

Fig
AT
26
Power
transmission

during
R

range

lI

a

Go

I
w
L

AT085

Fig
AT

27

Operation
of
each
mechani6m

duirng
OR

range

Clutch
low
Band
servo
One

Parking

Ran
Gear

ratio
reverse

way

pawl

Front
Rear

brake
Operation
Release

clutch

Park
on
on

Reverse
2
182
on
on
on

Neutral

01
low
2
458
nn
on

Drive
D2
Second
458
nn
on

OJ

Top
1
000
on
on

2
Second
458
nn

t2
Second
458
on

tt
low
2
458
on
on

AT

16

AUTOMATIC

TRANSMISSION

R

range
Reverse

o
fro

Clutch
R

Clutch
Low
0

R

8

B
e

Torque
Con

14

Q

T
CO
fI

I
9
ID
v

Th

Vel

r

j
Orei

1
Ve

Front

Lubdce

O
IfQ

Cheek

Vah
OJ

iJ

Thronle

D
ein

V
D
i
V

l

x

21

CDp

R
Iulato
Velv

@

Not

M
k
r
D
ein

Unep
n
IGover
o

t
t
praaur
1

G
l
Gov
r
o

pr

Torque
CO

rler

p

ThrOU

epr
s
cOnclMV

Gov
nOt
V
P

i
V

Gov
nor
Velv

Fie
A
T
28
Oil

pressure
circuit

diagram
R

range
RelJerse

AT
17

CHASSIS

rang
e

eutral

In
N

range
all

the
clutches
and

band
are

not

applied
therefore
no

power
is
triJllsmilted

10
the

output

shaft

The

pressure
of
oil

discharged
from

the
oil

pump
is

regulated

by
the

pressure
regulator
valve

D
to
maintain

the
line

pressure
7
and
the
oil

is
led

to
the

manual
valve

r
2
vacuum
throt

tle
valve

@
and
solenoid
downshift

valve

@
The
oil
is

further
introduced

into
the

torque
converter
at
its

operat

ing
pressure
14
and

a

portion
of
this

oil

is
distributed

to
each

part
as
the

front
lubricant
The
oil

which
has
been

discharged
from
the

torque
converter

is
also

distributed
to
each

part
as
the

rear
lubricant

As
the

oil

pump
rotates
at
the

same

speed
as
thal
of
the

engine
the

dis

charge
of
oil

pump
increases
with
the

engine
speed
But

the

surplus
oil

is

returned
to
the

oil

pan
by
the

pressure

regulator
valve

D

I

l
nUI

h
lo
BJnd
oefVQ
On

Parkin
Gt
ar

Rang
e
rl
tro
e
lA

a

pawl
ratio

Front
RUT
brake
Operation
Rdu
e

clutch

Park
on
on

Revtr
21Rl
on
on
on

Neutral

01
Low
2
458
on
on

Orive
02
Second
1
458
on
on

OJ

Top
1000
on
on

ton
on

2
cond
1
58
on
on

12
Second
1
458
on
on

I

II
low
2
458
on
on

AT
iS

AUTOMATIC
TRANSMISSION

UN

range
Neutral

Low

R

Brek

B
eke

B

x

12

VK

Th
o
I

V
lv
7

G
0

j

Lve

Fro

Lub
lc
l

Otifite

Check

Valve
D

alnValve
j

11

I
3

ThrOUle

OrOlln

Vah
f
11

J

l

8
5018

Back
up
g

Dow
ill
V
lv

V
v

P
Modif

V
lve

15

13

8Jlux

3

j
p
ssu

A
euleto
Velye
6

lL

2
Menuel

V
lv

iiJIN
NOI
M
ked
O
in

Lin
pre
lGovernor
teed

pr
e

Gove
no

pr
s

Torquecon
e

p
e5SU

ThroW

p
S
Ond

y

G
o
V

8
Primary

Goy
no
V
l

Fig
A
T
29
Oil

pressure
circuit

diagram
N

range
Neutral

AT
19

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

AUTOMATIC
TRANSMISSION

D

range
2nd

gear

Q
FrO
ll

Cluteh
Low

to
R

B
e

8
eke

Torque

Con
ert

14

Throttle

Beck

up

V
l

iftV
I
a
Q

T
COU

P

R
V

A
Lubfkatlon

11

Drain

14

V
I

l
CID
V

Thro

Valli
7

If
SOle

Wo

Front

Lubrlc
at

n
Orific

Check

V

I
OralnValw

Tt
oW

Q
aln

V

l
S
P

Modit
V

2

S

13

j
P

RIGulato
Vel
@2nd
3
dShIH

V

I

13

c

33J

2nd

ShlftV
I
e

s

Manual

V

I

n

NOla
M
ked
X
r
Drein
r
D

I
U

jeeo
v
Primarv

Gov
no
Valva
Goyarno

Val
Li
p
su

aIGo
no
IMod

pr
surel

Gov
nO

pr
sur

TO

Qu
con

pr

Th
on

p

Fig
A
T
35
Oil

pressure
circuit

diagram
D2

range
2nd

gear

AT
23

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