transmission DATSUN B110 1969 Service User Guide

Transmission

lransmission

FOUR
SPEED
TRANSMISSION
Idler
shaft
and
front
sIde
of
the
transmiSSIOn

case

supports
the
other
ends

Moreoyer
the
rear
extensIOn

supports
the

mam
shaft
rear
end

The

gear
assembly
can
be

dIsassembled
With

the

gear
assembly
Installed

on
the

adapter

plate
The
transmiSSIOn

assembly
cons1sts
of
tran

smISSIOn
case
whIch

con
tams

gear
assembly

and
rear
extensIOn

The
cast

Iron

adapter
plate
supports
each
end

of
the
mam
sO
aft

counter
shaft
and

reverse

1T

Fig
157
R3W56

gear
tram
Fig
158
F4W56

gear
tram

e

1
l

j
iir

1

1
lkv

t
J

I

If
Jo

rn
r
J

J

v

li
I

v
1

1

rr

v

Fig
159
F4W56
transmisSion

11M

Iransmission

THREE
SPEED
TRANSMISSION

Fig
160
R3W56
transmisSion

TROUBLE
SHOOTING

Symptom
and

possible
cause

I
Correc
tIve
actIOn

Difficult
to
mtermesh

gears

Causes
for

difficult

gear
shlftmg
are

classIfied
to
troubles

concernmg
the
control

system
md
transmlSSlUn
When
the

gear
shift
lever

IS

heavy
and
It
IS
difficult
to

shift
ge
us

clutch
disengagement
mdY
also
be
unsmooth
First
make

sure

that
the
clutch

operates
correctly
and

Inspect
the
transmiSSion

105

Transmission

Worn

gears
shaft
and
or

heanng
Repl
ll
c

In
ufficlcnt

operatmg
stroke
due
to
worn
or
loose

shdmg

pdll
Repair
or

replal
c

Defective
or

damaged

synchronIzer
Replace

Gear

slips
out

of
mesh

In
the
most
cases
thiS
trouble
occurs
when
the
Interlock

plunger
check
ball
and
or

spnng
IS
worn
or
weakened
or

when
the
control

system
IS
defectIve
In
thiS
Cd
the
trouble
cannot
be

corrected

by
repldtlllg
gt
drs

and
therefore

trouble
shootmg
must
be

earned
out

carefully
It
should
also
be
noted
that

gear
slips
out
of
mesh
due
to
vlbralIon

generated
by
weakened
front
and
rear

engme
mounts

Worn
mterlock

plunger
Replal
c

Worn
check
hall
and
or

weakened
or
broken

sprmg
Replal
c

Worn
fork
rod
ball

groove
RepI

H
e

Worn
or

damaged
beanng
Repldce

Worn
or

damaged
gear
Repldl
c

NOise

When
nOIse

occurs
unoer
engine
Idling
and

stops
whde
the
clutch
IS

dlseng
lged
or
when
nOI
Olcurs
while

shlftmg

gears
It

may

Judged
that
the
nOIse

IS
from
the
tranSmll
lSIUn

Ino

ufllclenl
or

1mproper
lubncant
Add
od
or

replace
With

deSignated

oIl

Ollleaklllg
due
to
defectIve
011
seal
md

gasket
clogged
breather
etc
Clean
or

replace

Worn
beanng

High
hummmg
occurs
at
a

high
speed
Replace

Damaged
beanng
Cychc
knockmg
sound
occurs
alllo
at
a
low

speed
Replace

Worn
each

sphne
Replace

Worn
each

hushmg
Replace

108

Transmission

AUTOMATIC
TRANSMISSION
DESCRIPTION

I
Ii
9
0
@
@

AT270

1
U
lllll

II
O
l

rn
lr
II

hkl1lllj
ItlrllUl
I
II

01
15
tu
07

011

pump
12

OUllJllt
holtl
h
llt
Ih

kl
Illllt
Ihl
16
to

i
II

1
1
runl
dUlth
13
Kl

JT
llhlOIl

01
10

01
20
to
2
5

4
B
H1d
brJkl
14
011

p
Jll
l
i
H
hl
7
14toHn

5
Re
u

du
h
15
lIT01
tlvt
@
41u5

@I
I
310
I
8

6
I
ronl

plJllctJry
lJr
16

Input
11
111

0
29101fll
194
013

1
Rldr

pIJIJC
IJ

ry
j
l
Lr
11
1
m

lu
n

lIh
T
6
5
tn
15

@
055toO
5

OIll
JYdutdt
rllT

11
l1
11l

@I
147
to

541
40
0
5
4

9
I
lW
RlVlr
l

bl
Jkl
19
Dm
l

plJh
16
III
8

CDT
l
2S
to

U
l

S

10
011
dl
nbulm
4

11n
i

HI

I
I
to
2

iJ

Flg
161
Cross
sectIonal
view

of
3N71B
automatic
transmIssIon

107

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

Transmission

AUTOMATIC

TRANSMISSION

IDENTIFICATION

Model
code

JAPAN

AUTOMATIC

I
0
TRANSMISSION

CO
L
TD

MODEL

NO
XOIOO

2412345

Unit
number

NlIlllher

deSignatIOn

2412145

c

l
Sendl

productIOn

number
for
the
monfh

Month
of

production

X
Oct
Y
Nov

Z
Pel

LJ
t

fll
Ure

denotmg

the

yedf
A
D

r

108

1
t
U
UMlt

O
M
t
t
g
p
p
i
Q
e

I
I
Vo
P
a
H

O
@
t

l
t

PA
Rlt
1tO
f
1
l
t

Jo
tEAtt
R

f
VA
fII
Efl
w
UfOR
Wifing
diagram
for
automatic
transmission
mode

fIg
1SO

Specifications

RECOMMENDED
LUBRICANT
SPECI
f
ICATIONS

Item
SpeCificatiOnS
Remarks

SAE
ClaSSIfIcatIon
Furthermore
refer
to

GasolIne

engme
011

SD
or
SE
SAE
recommended

VISCOSity

table
See

Page
GI
5

Transmission

and
API
GL4

0

steenng

l

Dlfferenllal
I

API
GLS

Automallc

TIM
flUId

Type
DEXRON

MultIpurpose
grease
NLGI2
LIthIUm

soap
base

Brake
and

clutch
flUId
OOT3

Antifreeze
coolant
Long
LIfe
Coolant

130

Specifications

IgnItIon
tlmmg
degree

Dlstnbutor
50
BTDC

POInt

gap

Dwell

angle
mm
m
04510055
0018
to0022

49
to
55

Condenser
capacIty
degrees

J
lF
MIcro
Farad
022

5

Condenser
insulatIon
reSiStance
Mil

Mega
hms

Spark
plug

Cdp
mm
lO
08to09
003IlO0035

Idle
CO

Idle

speed

Manual
transmissIon

Irpm

Irpm
I
5
iO

51800

Automatic
transmission
I
5
iO

51650
10
D

pOSItIOn

Dash

pot

Settmg
englOe
speed
rpm
1
900
10
2

000

Throllle

opener
at
sea

level

Settmg
vacuum

pressure

Manual

tranSffiI
sSlon

Automatic
transmission

Sell

109
englOe
speed
no
load

Servo

diaphragm
full
stroke
rpm

mm

m
500
to

540

19
7
to
213

48010520
18

9
to

20
5

1
650
to
1
850

5
01969
mmHg
10

Hg

mmHg
10

Hg

Thermo

SWitch
Temperature
nses

from
low
to

hIgh
oc
0

F
above
5

41

Flow

gUIde
valve

Operating
pressure
mmHg
10

Hg
10
04

133