Ford 2003 Mustang Workshop Manual page 92

Symptom Chart—Transmission (Automatic) Noise/Vibration
Condition
Rattle—occurs
at idle or at
light
acceleration
from a stop
Whine—pitch
increases with
vehicle speed.
Starts in first
and second
gear,
decreases or
goes away at
higher gears
Whine—the
pitch changes
with engine
speed
Whine—pitch
changes with
vehicle speed
Whine/moan
type noise—
pitch increases
or changes
with vehicle
speed
flange runout.
Possible Sources
Damaged engine or
transmission mounts.
A loose front exhaust
pipe heat shield.
Loose inspection
plate or dust cover
plate.
Loose flex plate to
converter nuts.
Damaged or worn low
one-way clutch.
Damaged or worn
intermediate one-way
clutch.
Friction elements.
Damaged or worn
planetary or sun gear.
A worn or damaged
accessory drive
component.
Incorrect fluid level.
Partially blocked filter.
Worn or damaged
torque converter.
Worn or damaged
front pump.
Speedometer cable
or gears.
Damaged engine or
transmission mount.
U-joints worn or
Action
CHECK the
powertrain/drivetrain mounts
for damage. REPAIR or
INSTALL new mounts as
necessary.
REPAIR or INSTALL a new
heat shield as necessary.
CHECK for loose bolts.
TIGHTEN to specifications.
REFER to Section 307-01
CHECK for loose nuts.
TIGHTEN to specifications.
REFER to Section 307-01
INSPECT the transmission
for wear or damage. REPAIR
or INSTALL new components
as necessary. REFER to
Section 307-01 .
CARRY OUT the Engine
Accessory Test. REPAIR or
INSTALL new components as
necessary.
CHECK that the transmission
is filled to the correct level.
ADD fluid as necessary.
REFER to Section 307-01
INSPECT the filter. CLEAN or
INSTALL a new filter as
necessary. REFER to Section
307-01 .
CARRY OUT the torque
converter service and
replacement check. REFER
to Section 307-01 .
INSPECT the front pump.
INSTALL a new front pump
as necessary. REFER to
Section 307-01 .
REPAIR or INSTALL new
cables or gears as necessary.
CHECK the
powertrain/drivetrain mounts
for damage. CARRY OUT
Powertrain/Drivetrain Mount
Neutralizing in this section.
INSPECT the U-joints for
.
.
.