Datsun 1980 200SX Service Manual page 202

TroubleDiagnosesa
Correctiofl
MANUAL TRANSMISSION
TROUBLE
DIAGNOSES
AND
CORRECTIONS
Level
color N G
Noise
Check
level and color
of oil
I
L
Add
replace oil If oil
leaks
repair
cause
Check noise
I
NOise does
not
stop
Noise
stops
O K
Level and color OK
Shift
gears and loco
te which
0
gear
position
makes
noise
I
Noise in Neutral
I
Disengage clutch
to
see
if
noise stops
I
Noise
does
not
stop
Noise outside transmission
Check
engine
and dutch
etc
Noise
occurs in a specific
gear
position
and
peaks at
specific engine
rpm
and
stops with gears in TOP
position
1
Noise
appears to
occur
in
transmission Disassemble
and check
gear in which
l
noise
occurs
for meshing
surface nd
bearings
1
Replace
gear
and
or
bearing
MIlS
Noise in
position
other
than
Neutral
Noise stops
Noise in transmission Noise may
be
caused
by
variations in
engine
torque
Adjust engine
idle speed
High roaring noise
occurs
in
all
positions
and
peaks 8t
specific engine
rpm
I
Noise
occurs
in all
positions
except Neutral and
peaks at
a
specific
car
speed
1
Noise
source
appears
to
be
located
in
differential
carrier
Check differential
carrier
and eliminate
cause
of
noise
Noise
occurs
while
shifting
gears
Refer
to
1he section
Faulty
Synchromesh
Mechanism
L
Gears grate while synchro
nizing
L
Noise
occurs
when
stroking
further
after
shifting
gears
Moving
parts
couplings
gears
etc
of transmission
interfering
with other
parts