Datsun 1968-1973 510 Owners Workshop Manual page 114

Chapter
6 Gearbox and automatIctransmIssIon
113
39 F
It a new
gasket
to
the extension
housmg
face
and partially
shde
over
the mamshaft
Engage
the
stnkmg
rod lever
10
the shIft
rod gates Push
fully
home
and
secure
wIth bolts and spnng
washers
40
Fit
a new cover
plate gasket
and then the
cover
plate Secure
with the fourteen bolts and spring washers which should be
tightened In a
progressive and
diagonal
manner
41
Insert
the
speedometer
drive
pinion
assembly
mto
the
extension
hOUSing
and
secure
10 position
with the
lockplate
and
bolt
42 Reconnect the gear change
lever mountmg bracket
to
the
strlkmg
rod and
Insert
the cleviS pm Lock with
a
clrclJp
43 Fit the clutch release lever
beanng
retaining spnng and
rubber dust
cover
44 The
gearbox IS now
ready
for
refitting to
the
car
Do not
forget
to
refIll the
gearbox
wIth the
recommended grade
of 011
The
capacIty
IS
30 I lop
plOtS
1 7 htres 3
2
US
plOtS
22 AutomatiC
transmiSSion
general desCription
A Nlssan model 3N71 B automatic transmiSSion
IS
fitted and
provides
a
full
automatic transmiSSion
with
a
range of 6 gear
poSitions
The
gear
sets
are
of the
Sympson planetary
type and
are
controlled
by
two
multi
plate
clutches
a
brake band and
a
multi disc brake
It will
automatically adjUst dUring
torque to
load and speed
by the selection of the
correct
ratio
depending
on
the driVing
conditions
The
Unit
Includes
a
three element
hydrokinetic
torque
converter coupling capable
of
torque
multiplication
at an
mflnltely
vanable
ratio
between 2 1 and 1
1
Due to the
complexity
of the automatic transmiSSion
Unit If
performance IS not
up
to
standard
or
overhaul
IS
necessary
It IS
Imperative
that thiS be undertaken
by
the local Datsun garage
who Will have
special equipment
for
accurate
fault diagnOSIs and
rectification It
IS
Important that the fault
IS
diagnosed before
the
Unit
IS
removed from the
car
The
content
of the
follOWing
sections
IS
therefore solely
general
and servicing information
23 AutomatiC
transmISSion
flUid level
It
IS
Important
that only
a
recommended grade of
automatic
transmiSSion
flUid
IS
used when
toppmg
up or
changing the flUid
1 With the
car
standing
on
level ground open the bonnet and
clean around the top of the 011 hller tube and dIpstIck
2 Move the selector lever
to
the P Park pOSItIon and firmly
apply the handbrake
3 Start the engme and allow
to run at a
fast Idle speed
until the
engine
and
transmiSSion
umt
reach their
normal
operating
temperature
4 With the engine running at
normal Idle
speed
Withdraw the
dipstick
Wipe
qUickly return
and
Withdraw agam
5 If necessary add suffiCient flUid
to
the
transmiSSion Unit
via
the filler tube to
bring
the level
to
the
full mark
on
the
dipstick
Do not
overfill the
Unit
24 AutomatiC transmiSSion removal
and replacement
1
Any suspected
faults must be
referred
to the local Datsun
garage before Unit
removal
as
with thiS
type
of
transmiSSion Its
fault must be confirmed
uSing
special equipment before
It
IS
removed from the
car
2 As the automatic transmission
IS
relatively heavy
It IS
best If
the
car IS
raised from the ground
on
ramps but
It IS
pOSSible
to
remove
the Unit If the
car IS
placed
on
high axle stands Tvvo
people
will be
required dUring
the later
stages
of removal
3
Disconnect the
battery poSitIVe
and
negative terminals
4 Refer
to
Chapter
10 and
remove
the starter motor
5 Place
a
large container under the dram
plug remove
the dram
plug and allow all the flUId
to
dram
out
Refit
the dram
plug
If
the
car
has recently been driven
take
care
because the flUId WIll
be very hot and
can
easily burn
6
D
sconnect
the filler tube and the
dIpstIck
from the trans
miSSion
casing and
remove
7 When
an
011 cooler
IS
fItted dIsconnect the pIpes and
plug
the
Unions to
stop
dirt Ingress
8
Detach the
transmiSSion
klckdown
control
cable from the
throttle
Imkage
9
Detach
the
speed
selector
equahser
and lever
assembly from
the Side of the
maIO
casing
10 Refer to
Chapter
7 and dIsconnect the
propeller
shaft
11
Disconnect the
speedometer cable from the dnven gear
on
the Side of the transmiSSion Unit
Then
remove
the dnven gear
and plug the hole
to
prevent
dIrt mgress
12 Refer
to
Chapter 9 and dIsconnect the handbrake secondary
cable from the lower end of the relay lever
13 The exhaust downplpe should
now
be dIsconnected from the
exhaust manifold
14 Make
a note
of the electrical
connectIons at
the start safety
SWitch
on
the Side of the
transmiSSion
unit
Disconnect the
cables
15 Place
a
pIece of soft wood
on
the saddle of
a garage
hydrauhc
Jack and
support
the weIght of the
rear
of the engine
16
Undo
and
remove
the bolts and washers that
secure
the
transmiSSion mounttng support to
the
underside of the
body
17 Undo and
remove
the bolts that
secure
the
mountmg
to
the
rear
extension
hOUSing
and hft away the
mounting assembly
18 Worlong through
the
starter motor
aperture
undo and
remove
the bolts that
secure
the torque
converter to
the engme
adaptor
plate
I
19 Undo and
remove
the
top
transmiSSion to
engine securing
bolts
20 Usmg
a
second
Jack preferably
of the
trolly type support
the
weight
of the
transmiSSion unit
21
Undo and
remove
the remalnmg bolts that
secure
the
trans
miSSion to
the engme
22
W th the
help
of
a
second
person
carefully
WIthdraw the
assembly
rearwards
so as to
clear the
converter
from the adaptor
plate
23
Whilst thIS
IS
bemg
done
take
great
care SO
that the
torque
converter
does
not
become
separated from the front of the
transmiSSion UOIt
24 The
Unit may now
be lifted away from the undersIde of the
car
25 Refitting the
transmiSSion UOIt IS
the
reverse
sequence
to
removal The followmg addItIOnal
pomts
should be noted
al Make
sure
that the converter
IS
fully
engaged 10
the front of
the
transmiSSion UOlt
and
In
the
spigot
10
the
rear
of the
crankshaft
b Make
sure
that the matmg
faces of
the torque
converter
housmg and
rear
of the engine crankcase
are
completely
clean
and free from brUISing
c
Check
that the
rear
engme
plate
IS
correctly positioned
dl The bolts
that
secure
the converter
to
the
adaptor plate
mult
be tIghtened
10 a
dIagonal
and progressIve
manner
The bolt
heads
must
be
on
the engine SIde
of
the
adaptor plate
e
Refill
the
transrmsslon umt
With
the correct amount
of
the
recommended
grade hydrauhc
flUId before the engme
IS re
started When
at
normal
operating temperature recheck
the
flUId level
fl It
WIll
probably
be necessary
to
adjUst
the selector rod
neutral
safety
SWItch and
throttle klckdown cable
as
deSCribed later
on 10
thIS Chapter
25 TransmISSIon shift hnkaga adJustment
1 Slacken the locknut
on
the
trunnion at
the upper end of the
speed elector rod
SO
that
It IS
pOSSIble
for the rod
to
shde
eaSIly
10
the
trunOlon
2 POSition the equahser and selector
lever
on
the transmiSSion