Datsun 1000 - MANUAL TRANSMISSION FAULT DIAGNOSIS

TO REMOVE AND
INSTAL
l
Jack
up
the rear
of the vehicle
and
support
on axle
stands
2
Mark across the
edges
of
the rear universal
joint
and rear axle
pinion flanges
to ensure
reassembly
in
thei
original positions
3 Remove
the four
universal
joint flanges
to rear
axle
pinion attaching
bolts and nuts
4
Withdraw
the
propeller
shaft to the rear and
disengage
the front
yoke
sleeve from
the
gearbox
mainshaft
Insert a
spare sliding
sleeve in the transmission
rear
cover to
prevent
loss of oil
Installation
is a reversal of the removal
procedure
TO DISMANTLE
AND
ASSEMBLE
1
Knock out
and remove
the two
securing
circ1ips
on
opposed
needle roller
bearings
of the front niversal
joint
2
Holding
the
joint
in a vice
and
using
a soft metal
drift
tap
on
the end
of one of the
bearing cups
to drive the
other
bearing
out
of
the
yoke
Lift
the
bearing
out with
the
Ianllal
Transmission 15
fingers
to
avoid
dislodging
the
needle rollers
3
Again
using
a
soft drift
tap
on the end of the
trunnion
of the
bearing just
removed to drive
the
other
bearing
out of
the
yoke
and
again carefully
remove
to avoid
dislodging
the
needle rollers
4
Manoeuvre
the
yoke
over the
ends
of
the trunnion
and withdraw from
the shaft
assembly
5
Treat the other
two
bearings
of the front
universal
joint
and
the
bearings
of the rear
universal
joint
in
a
similar
manner to
completely
dismantle
the
propeller
shaft
6 Check the needle roller
bearings
and
trunnions for
wear I f
wear
is
apparent
renew
the trunnions and
bearings
as
a kit Never renew individual
needle roller
bearing
assemblies
or
fit old
bearings
to
a new trunnion
Always
use
new
bearing retaining circlips
and
bearing
seal washers
Reassembly
is a reversal of the
dismantling procedure
NOTE
When
dismantling or reassembling
do lIor
hold
the
machined
section
of
the
front
u
niversal
joint yoke
in
the
unprot
cred
jaws
of
a vice
or
the seal
surface of
the
yoke
will be
damaged
Where
necessary
reduce
any bearing cup
end
float
bv
installing
oversize
circlips
GEARBOX
PART
4
MANUAL TR1
NSMISSION FAUI T DIAGNOSIS
I Difficult
gear
change
Possible cause
a
Maladjustment
of selector
mechanism
b
Faulty gear synchroniser
mechanism
c
Faulty
clutch or clutch
release mechanism
d
Damaged gear
teeth
e
Distorted
transmission
shaft
splines
2
Gear clash
on
changing
down
Possible cause
a
Faulty
clutch
or clutch release mechanism
b
Faulty synchro rings
and
cones
c
Broken
or incorrect
positioning
ofsynchro
bar
retaining springs
d
Gearbox
lubricating
oil too
heavy
3
Slipping
nut
of
gear
1st
and
2nd
Possible cause
a Weak or
broken selector
shaft
detent
spring
b
Worn mainshaft
sliding
gear
or
laygear
Remedv
Check and
adjust
selector mechanism
Overhaul
gearbox
Check and overhaul clutch and or
adjust
release
me hanism
Renew
damaged components
Renew
damaged
component
Remedy
Overhaul clutch and or
adjust
release mechanism
Check
and
overhaul
gearbox
renew
components
as
required
Check and overhaul
gearbox
renew
components
as
required
Drain
gear
case and
refill with correct
quantity
and
grade
of oil
Remedy
Renew
faulty
components
Check and
renew
faulty
components
71
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