1969 DATSUN B110 engine

Transmission

AUTOMATIC
TRANSMISSION

The
model
3N71B

automatic
transmiSSIOn
IS

a

fully
automatic
Unit

consisting

pnmanly
of

3
element

hydrauhc
torque
converter
and
two

planetary
gear
sets
Two

multiple
disc
clut

ches
a

multiple
disc

brake
a
band

brake
and

a
one

way

sprag
clutch

provide
the
fnctlon

elements

reqUired
to
obtain
the
deSired

fun

tlon
of

the
two

planetary
gear
sets

The
two

planetary
gear
sets

give
three
for

ward

ratIOs
and
one
reverse

Changing
of
the

gear
ratIOs
IS

fully
automatic

In
relation
to

vehicle

speed
and

engine
torque
Input

Vehicle

speed
and

engine
mamfold

vacuum

Signals
are

constantly
fed
to
the
transmiSSIOn

to

prOVide
the

proper

gear
ratIO

for
maximum

effiCiency
and

performance
at
all
throttle

openmgs

The
Model

3N71B
has
SIX
selector

poSitIOns

P
R
N

D
2
1

p
Park

pOSitIOn

posItively
locks
the
out

put
shaft
to

the
transmiSSIOn

case

by
means
of

a

lockmg

pawl
to

prevent
the
vehicle
from

rollmg
either

directIOn

ThiS

pOSitIOn
should
be
selected
whenever
the

dnver

leaves
the
vehicle

The

engme
may
be
started
m
Park

pOSition

R
Reverse

range
enables

the
vehicle

to

be

operated
m
a
reverse
direction

N
Neutral

pOSitIOn
enables
the

engine
to

be
started
and

run
Without

dnvIngthe
vehicle

0
Drive

range
IS
used

for
all
normal

driVing
conditions
Dnve

range
has
three

gear

ratios
from
the

startmg
ratIO
to
direct
dnve

2
2

range
prOVides
performance
for

dnvIng
onshppery
surfaces

2

range
can
also

be

used
for

engine

brakmg

2

range
can

be
selected
at

any
vehicle

speed

and

prevents
the
transmlsslOn

from

shifting

out
of
second

gear

108
Rg
162
Idenllflcatlon

number

I
1

range
can
be

selected
at

any
vehicle

speed
and
the
transmiSSIOn
will
shift
to
second

gear
and

remain
m
second
until
vehicle

speed

IS
reduced
to

approximately
25
to
31
MPH

1

range
posItion
prevents
the
transmiSSIOn

from

shlftmg
out

of
low

gear
ThiS

IS

par

tlcularly
benefiCial
for

mamtamIng
maximum

engine
brakmg
when

continUOUS
low

gear

operation
IS
deSirable

The

torque
converter

assembly
IS

of
welded

constructIOn
and
can
not
be
dlssassembled
for

service

FlUld
Recommendatwn

Use
automatic
transmiSSIOn
flUid

haVing

DEXRON
IdentificatIOns

only
m
the
3N71B

automatic
transmiSSIOn

denttficatwn
Number

Stamped

posttwn

The

plate
attached
to
the

rIght
hand
Side
of

transmission
case
as
shown
m

Figure
161

denttficatwn
of
number

arrangements

See

Page
109

RECOMMENDATIONS

Due
to
the

compleXity
of

setting
up
a

disassembled
transmissIOn
as
well

as
the

special
tools

necessary
It

IS
recommended

thaL
nternal

epalrs
be
left
to

a

fully

eqUip

ped
shop

II
II
II
II
Oil
pressure
and
ignition
warning
lamps

condition

Oil
pressure
warn

ing
lamp

The
amp
does
not

hght
when
the

19I1ItlOn
sWItch
IS

set
to
ON

II
I
Ptobable
cause

Blown
off
fuse
or
faulty
contact

Broken
lamp
bulb
filament
or

faulty
cable
contact

Defective
oil
pressure
swltch

The
lamp
does
not
Oil
pressure
IS
toO
loW

go
out
wlule
the

engtne
IS
being

operated
Lack
of
engine
oil

Defective
Oil
pressure
sWitch

Il
MethOd
of

tnSpeCtlOn

Check
the
fuse
for
fusing
and

faulty
contact

The
warntng
lamP
does
not
bght

when
oil
pressure
sWitch
yelloW
I

black
cable
15
grounded

The
warntng
lamp
bghts
through

the
above
tnspectlOn

inspect
the
engine
ou
pressure

system
Check
011
level

ConttnUlty
eXists
on
the
oil
pres

sure
sWltch
when
the
engine
IS

belng
operated

o

a
t
a

CorrectIVe
action

Replace
after
COffee

tlng
the
fuse
the

cause
lf
fused

Check
the
hght
bulb

for
burnt
out
fila

ment
and
replace
as

reqUIred
Replace
the
011
pres

Sure
sWitch

Add
oil

Replace
the
01
pres

sure
sWitch

Specifications

SERVICE
DATA

Valve
clearJnce

IHot
mm
In

mm
In

mm
In

kg
Ib
Intdke

exhaust

Fan
belt
tensIOn

Tlghtemng
torque
Cold

Cyhnder
head

bolts
kg
m
ft
Ib

1st
turn

2nd
turn

Re

l1ghtemng
torque
Hot

Mamfold
nuts

Carburetor

nuts

Spark

plugs

ad

capacIty
of

engine
including
od
filter

Maximum
L
US

gal
Imp
gal

L

US

gal
Imp
gal
Mmlmum

Water

capacity
of
coohng

system

Wllhout
heater
L

US

gal
Imp
gal

W
th
heater
L

US

gal
Imp
gal

CompressIOn
pressure
at

rpm
kg
cm2

PSI

Battery
specific
gravity

FrigId
climates

Tropical
clImates

Other
climates

132
Permlsslble
value

rlver
I
22

Over
118

Over
I
20
035
0014

035
0014

10
to
15
0
394
to
0
591

10
22

40
to
4
5
29
to
33

5
5
to
6
0
40
to
43

60
to

6
5
43
to
47

09toI4
65toI0

o
5
to
I
0
3
6
to
7
2

I
5
to
2
0
II
to

14

33
l

2
3

10

42
Ji

49
1
4
IJi

125
to
145
78
to
206
350

Fully
charged
value

at
20
C
68
F

128

123

126

Specifications

ENGINE

GENERAL
SPECIFICATION

Cylinder
Jrrangement
4mlme

Displacement
ce
eu
m

71
71
5

Bore
and
stroke
mm
m

73
x
70

2
874
x
2
756

Valve

arrangement
Over
head
vdlve

Fmng
order

I
3
42

Engine
Idle

rpm
800

Manual
transmiSSIOn

650m

D
Automatic

transrmsslon

Compresc
lon
ratio

85

011

pressure
Hol

al
2
000

rpm
kg
em

Ib

sq
m

3
0
to
3
5
43
10
50

TIGHTENING
TORQUE

Uml

kg
m
ft

Ib

Cyhnder
head
bolts

5
5
10
6
0
40
10
43

3
2
to

3
8
2310

28
CQnnedmg
rod

nuts

Flywheel
bolls

651075
471054

Main

bearing
cap
bolts
5
0
10
6

0
36
to

43

4
0
10
4
8
29
10
35

o
4
to
0
6
2
9
1043
Camshaft

gear
bolts

011

pan
bolts

Ot

pump
bolts

1
I
to
I
7
8
0
10
12

o
9
to
I
4
65
to
lO

J5
to
16

108
to
116
011
stramer

bolts

Crank

pulley
bolts

134