wheel FORD MUSTANG 2003 Owner's Manual

„
Loudness proportional to vehicle speed. Low- frequency noise at high
speeds, noise and loudness increase with speed. GO to Symptom Chart —
Driveline Noise/Vibration .
„ A low- pitched noise (drumming). GO to Symptom Chart — Engine
Noise/Vibration .
„ Vibration occurs at a particular speed (mph) regardless of acceleration or
deceleration. GO to Symptom Chart — Tire Noise/Vibration .
„ Noise varies with wind/vehicle speed and direction. GO to Symptom Chart — Air Leak and Wind Noise .
„ Related to engine speed.
„Noise varies with engine rpm. GO to Symptom Chart — Engine
Noise/Vibration .
„ Vibration occurs at a particular speed (mph) regardless of engine speed
(rpm).
2. Acceleration
„Wide open throttle (WOT)
„Engine induced contact between components. Inspect and repair as
necessary.
„ Noise is continuous throughout WOT. Exhaust system or engine ground
out. GO to Symptom Chart — Engine Noise/Vibration .
„ Light/moderate acceleration
„Tip- in moan. Engine/exhaust noise. GO to Symptom Chart — Engine
Noise/Vibration .
„ Knock-type noise. GO to Symptom Chart — Engine Noise/Vibration .
„ Driveline shudder. GO to Symptom Chart — Driveline Noise/Vibration .
„ Engine vibration. GO to Symptom Chart — Engine Noise/Vibration .
3. Turning noise. GO to Symptom Chart — Steering Noise/Vibration .
4. Braking
„Clicking sound is signaling ABS is active. Acceptable ABS sound.
„ A continuous grinding/squeal. GO to Symptom Chart — Brake Noise/Vibration .
„ Brake vibration/shudder. GO to Symptom Chart — Brake Noise/Vibration .
5. Clutching
„A noise occurring during clutch operation. GO to Symptom Chart — Transmission
(Manual) and Transfer Case Noise/Vibration .
„ Vibration. GO to Symptom Chart — Transmission (Manual) and Transfer Case
Noise/Vibration .
6. Shifting
„Noise or vibration condition related to the transmission (automatic). GO to
Symptom Chart — Transmission (Automatic) Noise/Vibration .
„ Noise or vibration related to the transmission (manual). GO to Symptom Chart —
Transmission (Manual) and Transfer Case Noise/Vibration .
7. Engaged in four- wheel drive. GO to Symptom Chart — Transmission (Manual) and
Transfer Case Noise/Vibration .
8. Cruising speeds
„Accelerator pedal vibration. GO to Symptom Chart — Engine Noise/Vibration .
„ Driveline vibration. GO to Symptom Chart — Driveline Noise/Vibration .
„ A shimmy or shake. GO to Symptom Chart — Tire Noise/Vibration .
9. Driving at low/medium speeds Klj . 11 ba
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occurs on first
(morning) brake
application
pads.
Caused by humidity and
low disc brake pad
temperature.
z Squealing noise— a
continuous squeal z
Disc brake pads
or linings worn
below minimum
thickness. z
INSTALL new disc brake
pads. REFER to Section 206 - 03 for front disc brake
pads or Section 206 - 04 for
rear disc brake pads.
z Squealing noise— an
intermittent squeal
brought on by cold,
heat, water, mud or
snow z
Disc brake pad. zAcceptable condition.
z Groaning noise—
occurs at low speeds
with brake lightly
applied (creeping) z
Disc brake
pads. z
Acceptable condition.
z Grinding noise—
continuous z
Disc brake pads
or linings worn
below minimum
thickness. z
INSPECT the disc brake
pads, brake discs and
attaching hardware for
damage. REPAIR or
INSTALL new components
as necessary. REFER to
Section 206 - 03 for front
disc brakes and Section 206 - 04 for rear disc brakes.
z Moaning noise zBrake linings
contaminated
with grease or
oil. z
INSPECT the brake pads
and shoes for
contamination. REPAIR or
INSTALL new components
as necessary. REFER to
Section 206 - 03 for front
disc brakes or Section 206 -
04 for rear disc brakes.
z Brake
vibration/shudder—
occurs when brakes
are applied z
Uneven disc or
drum wear.
z Uneven disc
brake pad or
lining transfer.
z Suspension
components. z
Go To Pinpoint Test A .
z Brake
vibration/shudder—
occurs when the brake
pedal is released z
Brake drag. zINSPECT the disc brake
pads or linings for
premature wear. REPAIR
or INSTALL a new caliper
or wheel cylinder as
necessary. REFER to
Section 206 - 03 for front
disc brakes and Section 206 - 04 for rear disc brakes.
Symptom Chart—
Driveline Noise/Vibration Condition
Possible Sources Action
z Axle howling or
whine— front or rear
axle z
Axle lubricant
low. z
CHECK the lubricant level.
FILL the axle to
specification.
z Axle housing zINSPECT the axle housing Klj . 17 ba
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damage.
for damage. REPAIR or
INSTALL a new axle as
necessary. REFER to
Section 205 - 02A for Ford
7.5 rear axles or Section 205 - 02B for Ford 8.8
integral axles.
z Damaged or
worn wheel
bearings or axle
bearings. z
CHECK for abnormal wheel
bearing play or roughness.
REFER to Wheel Bearing Check in this section.
ADJUST or INSTALL new
wheel bearings as
necessary.
z Damaged or
worn differential
ring and pinion. z
INSPECT the ring and
pinion ring for abnormal
wear patterns or broken
teeth. INSTALL a new ring
and pinion as necessary.
REFER to Section 205 - 02A
for Ford 7.5 rear axles or
Section 205
- 02B for Ford
8.8 integral axles.
z Damaged or
worn differential
side or pinion
bearings. z
CHECK for abnormal
bearing play or roughness.
INSTALL new bearings as
necessary.
z Damaged or
worn differential
side gears and
pinion gears. z
DISASSEMBLE the
differential carrier. INSPECT
the side and pinion gears for
abnormal wear patterns or
broken teeth. INSTALL new
gears as necessary. REFER
to Section 205 - 02A for Ford
7.5 rear axles or Section 205 - 02B for Ford 8.8
integral axles.
z Driveline clunk— loud
clunk when shifting
from reverse to drive z
Incorrect axle
lubricant level. z
CHECK the lubricant level.
FILL the axle to
specification.
z Excessive
backlash in the
axle or
transmission. z
CARRY OUT a total
backlash check. REFER to
Section 205 - 00 .
z Damaged or
worn pinion
bearings. z
CHECK for abnormal
bearing play or roughness.
INSTALL new bearings as
necessary. REFER to
Section 205 - 02A for Ford
7.5 rear axles or Section 205 - 02B for Ford 8.8
integral axles.
z Damaged or
worn universal
joints (U- joints). z
INSPECT the U- joints for
wear or damage. INSTALL
new U- joints as necessary.
REFER to Section 205 - 01 .
z Loose
suspension
components. z
INSPECT the suspension
for damage or wear.
REPAIR or INSTALL new Klj . 18 ba
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Section 204 - 01 .
z Damaged or
worn wheel
bearings z
CHECK for abnormal wheel
bearing play or roughness.
Refer to Wheel Bearing Check in this section.
ADJUST or INSTALL new
wheel bearings as
necessary.
z Clicking or
snapping— occurs
when accelerating
around a corner z
Damaged or
worn outboard
CV joint. z
INSPECT the outboard CV
joint and boot. REPAIR or
INSTALL a new CV joint as
necessary.
z High pitched
chattering— noise
from the rear axle
when the vehicle is
turning z
Incorrect or
contaminated
lubricant. z
CHECK the vehicle by
driving in tight circles (5
clockwise, 5
counterclockwise). FLUSH
and REFILL with the
specified rear axle lubricant
and friction modifier as
necessary.
z Damaged or
worn differential
(differential side
gears and pinion
gears). z
DISASSEMBLE the
differential assembly.
INSPECT the differential
case, pin and gears for wear
or damage. REPAIR or
INSTALL a new differential
as necessary. REFER to
Section 205 - 02A for Ford
7.5 rear axles or Section 205 - 02B for Ford 8.8
integral axles.
z Buzz—buzzing noise
is the same at cruise
or coast/deceleration z
Damaged or
worn tires. z
CHECK for abnormal tire
wear or damage. INSTALL a
new tire as necessary.
REFER to Section 204 - 04 .
z Incorrect
driveline angles. z
CHECK for correct driveline
angles. REPAIR as
necessary. REFER to
Section 205 - 00 .
z Rumble or boom—
noise occurs at
coast/deceleration,
usually driveshaft
speed related and
noticeable over a
wide range of speeds z
Driveshaft is
out-of- balance. z
CHECK the driveshaft for
damage, missing balance
weights or undercoating.
CHECK the driveshaft
balance. CARRY OUT a
driveline vibration test.
REFER to Section 205 - 00 .
z U-joints binding
or seized. z
ROTATE the driveshaft and
CHECK for rough operation
or seized U- joints. INSTALL
new U- joints as necessary.
REFER to Section 205 - 01 .
z Excessive
pinion flange
runout. z
CARRY OUT a runout
check. REPAIR as
necessary. REFER to
Section 205 - 00 .
z Grunting— normally
associated with a
shudder experienced
during acceleration z
Driveshaft slip
yoke binding. z
CLEAN and LUBRICATE
the male and female
splines. Klj . 20 ba
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CARRY OUT a driveline
vibration test. REFER to
Section 205
- 00 . REPAIR as
necessary.
z Binding or
damaged
splines on the
driveshaft slip-
yoke. z
CLEAN and INSPECT the
splines of the slip- yoke,
driveshaft and coupling
shaft for wear or damage.
INSTALL a new slip- yoke or
driveshaft assembly as
necessary. REFER to
Section 205 - 01 . REPAIR as
necessary.
z Driveshaft
runout. z
CARRY OUT a Runout
Check. REFER to Section 205 - 00 . REPAIR as
necessary.
z Incorrect lateral
and radial
tire/wheel
runout. z
INSPECT the tire and
wheels. MEASURE tire
runouts. REPAIR or
INSTALL new components
as necessary. REFER to
Section 204 - 04 .
z Driveline angles
out of
specification. z
CHECK for correct driveline
angles. REPAIR as
necessary. REFER to
Section 205 - 00 .
z Incorrectly
seated CV joint
in the front
wheel hub. z
CHECK the outer CV joint
for correct seating into the
hub. REPAIR as necessary. Symptom Chart —
Engine Noise/Vibration Condition
Possible Sources Action
z Grinding noise—
occurs during
engine cranking z
Incorrect starter
motor mounting. z
INSPECT the starter motor
for correct mounting.
REPAIR as necessary.
REFER to Section 303 - 06 .
z Starter motor. zCHECK the starter motor.
REPAIR or INSTALL a new
starter motor as necessary.
REFER to Section 303 - 06 .
z Incorrect starter
motor drive
engagement. z
INSPECT the starter motor
drive and flexplate/flywheel
for wear or damage.
INSTALL a new starter
motor drive or flywheel as
necessary. REFER to
Section 303 - 06 .
z Engine ticking
noise z
Fuel injector.
z Fuel line.
z Oil pump.
z Valve lifter.
z Belt tensioner.
z Water pump.
z Obstruction of cooling
fan. z
Go To Pinpoint Test B .
z Engine drumming zPowertrain mount. zCARRY OUT Klj . 23 ba
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high idle during the
first cold start of the
day
lifter/lash
adjuster).
z A continuous, speed-
dependent rattle from
the engine — occurs
during idle or high idle
during the first cold
start of the day and
disappears as the
engine warms up z
Piston noise or
valvetrain noise
(bled down
lifter/lash
adjuster). z
Go To Pinpoint Test G .
z Idle vibration—a low-
frequency vibration (5-
20 Hz) or mild shake
that is felt through the
seat/floorpan z
Cylinder misfire. zUsing a scan tool, CHECK
the ignition system. CARRY
OUT a cylinder power test.
REFER to Section 303 - 00 .
z Engine or
torque
converter out of
balance. z
VERIFY the torque
converter to crankshaft pilot
clearance is correct,
REPAIR as necessary. RE-
INDEX the torque converter
on the flex plate by 120° on
a 3 bolt converter or 180° for
a 4 bolt converter. REFER to
Section 307 - 01 . RETEST
the vehicle.
z Idle vibration—a high-
frequency vibration
(20–80 Hz) or buzz,
that is felt through the
steering wheel or seat z
Exhaust system
mounts bound
up. z
VERIFY concern occurs at
engine firing frequency.
CHECK that the exhaust
system vibrates at the same
frequency as the engine.
ADD 9– 14 km (20–30 lb.) to
the tail pipe to test, CARRY
OUT Exhaust System Neutralizing in this section.
z Body mounts
loose. z
INSPECT the body mounts.
REPAIR as necessary.
z Power steering
lines grounded
out. z
INSPECT that the power
steering lines are not
contacting the chassis or
each other. REPAIR as
necessary. Symptom Chart—
Squeak and Rattle Condition
Possible Sources Action
z Squeak— heard
inside the vehicle
when
closing/opening
the door z
Insufficient
lubrication on
the door hinge
or check strap. z
LUBRICATE the hinge or check
strap.
z Internal door
components
loose, rubbing or
misaligned. z
CHECK the inside of the door.
TIGHTEN or ALIGN as
necessary. USE the Rotunda
Squeak and Rattle Kit to isolate
any rubbing components.
z Squeak— heard
inside the vehicle
when z
Worn or
damaged glass
run/channel. z
REPAIR or INSTALL a new
glass run/channel. REFER to
Section 501 - 11 . Klj . 31 ba
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misaligned.
screws. REPAIR as necessary.
z Loose interior
component or
trim. z
CARRY OUT a "touch test".
ELIMINATE the noise by
pressing or pulling on interior
trim and components. USE the
Rotunda Squeak and Rattle Kit
to isolate any rattling/squeaking
components.
z Squeak or rattle—
noise with a
vibration concern z
Damaged or
worn body
mounts. z
INSPECT the upper and lower
absorbers and washers for
damage or wear. CHECK the
body mount brackets for
damage. CHECK the nuts and
bolts are tightened to
specifications. TIGHTEN as
necessary.
z Damaged or
worn sub- frame
mounts. z
INSPECT the upper and lower
absorbers for damage or wear.
CHECK the sub- frame for
damage. CHECK the nuts and
bolts are tightened to
specifications. TIGHTEN as
necessary. Symptom Chart—
Steering Noise/Vibration Condition
Possible Sources Action
z Steering grunt or
shudder — occurs
when turning into
or out of a turn at
low speeds
(temperature
sensitive) z
Steering gear or power
steering hoses. z
GO to Steering Gear
Grunt/Shudder Test
component test in this
section.
z Steering System
clonk— hydraulic
knocking sound z
Air in the steering
hydraulic system. z
CHECK for leaks in the
system. PURGE the air
from the system.
REFER to Section 211 -
00 .
z Power steering
pump moan —
loud humming
noise occurs when
the steering wheel
is rotated to the
stop position.
Produces a 120-
600 Hz frequency
that changes with
rpm z
Power steering hose
grounded out to
chassis. z
INSPECT the power
steering hoses. REPAIR
as necessary.
z Aerated fluid. zCHECK for leaks in the
system. PURGE the air
from the system.
REFER to Section 211 -
00 .
z Steering gear isolators. zINSPECT the isolators
for wear or damage.
REPAIR as necessary.
z Low fluid. zCHECK the fluid level. Klj . 33 ba
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REFILL as necessary.
z Power steering pump
brackets loose or
misaligned. z
CHECK bolts, brackets
and bracket alignment.
TIGHTEN bolts to
specification. REPAIR
or INSTALL new
brackets as necessary.
REFER to Section 211 -
02 .
z Steering gear clunk
— occurs only
while cornering
over a bump (can
be temperature
sensitive) z
Steering gear. zINSPECT the steering
gear for loose mounting
bolts. TIGHTEN as
necessary. REFER to
Section 211 - 02 .
z Feedback (rattle,
chuckle or
knocking noise in
the steering gear)
— a condition
where roughness is
felt in the steering
wheel when the
vehicle is driven
over rough
surfaces z
Column
intermediate/flexible
shaft joints damaged or
worn. z
INSTALL a new
intermediate/flexible
shaft. REFER to Section 211 - 04 .
z Loose, damaged or
worn tie- rod ends. z
TIGHTEN the nuts to
specification or
INSTALL new tie- rod
ends as necessary.
REFER to Section 211 -
02 .
z Steering gear
insulators or mounting
bolts loose or
damaged. z
TIGHTEN the bolts or
INSTALL new bolts as
necessary. REFER to
Section 211 - 02 .
z Steering column
intermediate shaft bolts
are loose. z
TIGHTEN the bolts to
specification. REFER to
Section 211 - 04 .
z Steering column
damaged or worn. z
REPAIR or INSTALL a
new steering column as
necessary. REFER to
Section 211 - 04 .
z Loose suspension
bushings, bolts or ball
joints. z
INSPECT the
suspension system.
TIGHTEN or INSTALL
new components as
necessary. REFER to
Section 204 - 01 .
z Feedback (nibble
at the steering
wheel) — a
condition where
slight rotational
movement is felt in
the steering wheel
when the vehicle is
driven over rough
or grooved z
Lateral runout in the
tire or wheel. z
GO to Pinpoint Test H . Klj . 34 ba
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surfaces
zYoke spring in the
steering gear. z
CHECK TSBs for
revised yoke spring for
applicable vehicles.
z Accessory drive
belt squeal/chirp—
when rotating the
steering wheel
from stop to stop z
Loose or worn
accessory drive belt. z
ADJUST or INSTALL a
new accessory belt as
necessary. REFER to
Section 303 - 05 .
z Power steering
gear hiss z
Steering column
intermediate/flexible
shaft- to-steering gear
is binding or
misaligned. z
REPAIR or INSTALL a
new
intermediate/flexible
shaft as necessary.
REFER to Section 211 -
04 .
z Grounded or loose
steering column boot at
the dash panel. z
REPAIR as necessary.
z Damaged or worn
steering gear input
shaft and valve. z
REPAIR or INSTALL a
new steering gear as
necessary. REFER to
Section 211 - 02 .
z Steering column
rattle z
Loose bolts or
attaching brackets. z
TIGHTEN the bolts to
specifications.
z Loose, worn or
insufficiently lubricated
column bearings. z
LUBRICATE or
INSTALL new steering
column bearings as
necessary. REFER to
Section 211 - 04 .
z Steering shaft
insulators damaged or
worn. z
INSTALL new
insulators. REFER to
Section 211 - 04 .
z Intermediate/flexible
shaft compressed or
extended. z
INSPECT the rubber
spider coupling for
damage. INSTALL a
new
intermediate/flexible
shaft. REFER to Section 211 - 04 .
z Steering column
squeak or cracks z
Insufficient lubricated
steering shaft
bushings. z
LUBRICATE the
steering shaft and shaft
tube seals.
z Loose or misaligned
steering column
shrouds. z
TIGHTEN or ALIGN the
steering column
shrouds.
z Steering wheel rubbing
against steering
column shrouds. z
REPOSITION the
steering column
shrouds.
z Insufficient lubricated
speed control slip ring. z
LUBRICATE the speed
control slip ring.
z Upper or lower bearing
sleeve out of position. z
REPOSITION the
bearing sleeves.
z Power steering
pump noisy z
Incorrect assembly of
components.
z Imperfections on the
outside diameter or z
REPAIR or INSTALL a
new power steering
pump as necessary.
REFER to Section 211 -Klj . 35 ba
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acceleration from a slow
speed or stop
assembly
mispositioned. and the rear suspension
for damage or wear.
REPAIR as necessary.
z Incorrect or high
CV joint
operating angle. z
CHECK vehicle ride
height is within limits.
REPAIR as necessary.
z Damaged or
worn front
suspension
components. z
CHECK for a loose
stabilizer bar, damaged
or loose strut/strut
bushings or loose or
worn ball joints.
INSPECT the steering
linkage for wear or
damage. REPAIR or
INSTALL new
components as
necessary.
z Shimmy—most
noticeable on
coast/deceleration. Also
hard steering condition z
Excessive
positive caster. z
CHECK the caster
alignment angle.
CORRECT as
necessary. REFER to
Section 204 - 00 .
Symptom Chart—
Tire Noise/Vibration Condition
Possible Sources Action
z Tire noise— hum/moan
at constant speeds z
Abnormal wear
patterns. z
SPIN the tire and CHECK
for tire wear. INSTALL a
new tire as necessary.
INSPECT for
damaged/worn suspension
components. CARRY OUT
wheel alignment.
z Tire noise— noise tone
lowers as the vehicle
speed is lowered z
Out-of- balance
tire. z
BALANCE the tire and
road test. INSTALL a new
tire as necessary. REFER
to Section 204 - 04 .
z Tire noise — ticking
noise, changes with
speed z
Nail puncture or
stone in tire
tread. z
INSPECT the tire. REPAIR
as necessary.
z Wheel and tire—
vibration and noise
concern is directly
related to vehicle
speed and is not
affected by
acceleration, coasting
or decelerating z
Damaged or
worn tire. z
Go To Pinpoint Test J .
z Tire wobble or
shudder — occurs at
lower speeds z
Damaged wheel
bearings. z
SPIN the tire and CHECK
for abnormal wheel
bearing play or roughness.
ADJUST or INSTALL new
wheel bearings as
necessary. REFER to
Section 204 - 01 .
z Damaged wheel. zINSPECT the wheel for
damage. INSTALL a new
wheel as necessary.
REFER to Section 204 -Klj . 38 ba
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