Ford 2003 Mustang Workshop Manual page 80

Squeak or rattle—
noise with a
vibration concern
Symptom Chart—Steering Noise/Vibration
Condition
Steering grunt or
shudder — occurs
when turning into
or out of a turn at
low speeds
(temperature
sensitive)
Steering System
clonk—hydraulic
knocking sound
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
misaligned.
Loose interior
component or
trim.
Damaged or
worn body
mounts.
Damaged or
worn sub-frame
mounts.
Possible Sources
Steering gear or power
steering hoses.
Air in the steering
hydraulic system.
Power steering hose
grounded out to
chassis.
Aerated fluid.
Steering gear isolators.
Low fluid.
screws. REPAIR as necessary.
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.
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.
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.
Action
GO to Steering Gear
Grunt/Shudder Test
component test in this
section.
CHECK for leaks in the
system. PURGE the air
from the system.
REFER to Section 211-
00 .
INSPECT the power
steering hoses. REPAIR
as necessary.
CHECK for leaks in the
system. PURGE the air
from the system.
REFER to Section 211-
00 .
INSPECT the isolators
for wear or damage.
REPAIR as necessary.
CHECK the fluid level.