Fiat X 1/9 1978 - Chassis Specifications

Ill - 1974
Section
No.
00
Page 3
General
Information
CHASSIS
type
128
AS
CLUTCH
Dry,
single-plate
type,
with
diaphragm
spring
release
mechanism.
Hydraulic
control.
Clutch
pedal
free-play
about
1%
in.
(30mm).
TRANSMISSION
Four
forward
speeds,
synchromeshed,
and
reverse.
Gear
shift
lever
on
floor
tunnel.
Gear
Ratios:
—first,
synchromeshed
3.583
to
1
—second,
synchromeshed
2.235
to
1
—third,
synchromeshed
1.459
to
1
——fourth,
synchromeshed
0.959
to
1
—reverse
3.714
to
1
DIFFERENTIAL
Differential
and
final
drive
gears
housed
in
transmis»
sion
main
case.
Final
drive
by
cylindrical,
helical-
toothed
gears.
Final
drive
ratio
4.076
to
1
(13/53).
Drive
to
rear
wheels
by
half-axle
swing
shafts
through
constant
velocity
joints,
three-lobe
type
inboard
and
ball-type
outboard.
BRAKES
Dual
hydraulic
system
on
four
wheels,
independent
at
front
and
rear.
Disk
type
brakes
front
and
rear.
Mechanical
hand
brake
acting
on
rear
wheel
calipers.
WHEELS
AND
TIRES
Disk
wheels
with
rim
type
Radial
tires,
size
Inflating
pressure
41/2JX13
145HR-13
front
26psi—rear
29psi
STEERING
_
Rack
and
pinion
type.
Ratio:
“—number
of
steering
wheel
turns
about
3
—corresponding
rack
travel
4.6
in.
(117mm)
Turning
circle
diam.
about
32
ft.
10
in.
(10m)
Steering
column
of
the
breakaway
mount
type
with
2
universal
joints.
Independent
and
symmetric
track
rods
to
each
wheel.
Sealed
for
life
joints.
FRONT
SUSPENSION
Independent
wheel
type.
Lower
control
arms
consisting
of
a
cross
rod
and
reaction
strut.
Sealed
for
life
joints.
Telescopic
knuckle
pillars
incorporated
in
double-
action
hydraulic
shock
absorbers.
Coil
springs
and
co-
axial
buffers.
Caster
angle,
unladen
car
Camber,
unladen
car
Toe-in,
unladen
car
+6°30’
to
+7°30’
0°
to
—l"
+0.080
to
+0240
in.
(+2
to
+6mm)
REAR
SUSPENSION
Independent
wheel
type.
Lower
control
arms
and
tele-
scopic
knuckle
pillars
incorporated
in
double
acting
hydraulic
shock
absorbers.
Coil
springs
and
co-axial
buffers.
Adjustable
cross
tie
rods.
Camber,
unladen
car
Toe-in,
unladen
car
—1°10’
to
—2"10’
+0360
to
+0.510
in.
(9
to
13mm)
ELECTRICAL
SYSTEMS
Voltage
12V
Battery
capacity
(at
20
hr.
discharge
rate)
60
Amp]
hr
Alternator
type
A124—14V-44A
Var.
3
Voltage
regulator,
BOSCH
type
ADli14V
Starter
motor,
FIAT
type
E840.8]12Var.1
Spark
plugs:
Champion,
type
NQY
AC,
type
42XLS
Marelli,
type
CW
7
LP
Thread
size
(metric)
M14
x
1.25
Gap
0.020
to
0.024
in.
(0.5
to
0.6mm)