Ford 2003 Mustang Workshop Manual page 103

J1 ROAD TEST THE VEHICLE
NOTE: Wheel or tire vibrations felt in the steering wheel are most
likely related to the front wheel or tire. Vibration felt through the
seat are most likely related to the rear wheel or tire. This may not
always be true, but it can help to isolate the problem to the front
or rear of the vehicle.
Test drive the vehicle at different speed ranges.
During the road test, if the vibration can be eliminated by placing
the vehicle in neutral or is affected by the speed of the engine,
the cause is not the wheels or tires.
Is there a vibration and noise?
J2 CHECK THE FRONT WHEEL BEARINGS
Check the front wheel bearings. Refer to
this section.
Are the wheel bearings OK?
J3 INSPECT THE TIRES
Check the tires for missing weights.
Check the wheels for damage.
Inspect the tire wear pattern. Refer to the Tire Wear Patterns
chart in this section.
Do the tires have an abnormal wear pattern?
J4 TIRE ROTATION
Spin the tires slowly and watch for signs of lateral runout.
Spin the tires slowly and watch for signs of radial runout.
Wheel Bearing Check in
Take
Yes
GO to J2 .
No
The wheel and tires
are OK. CONDUCT a
diagnosis on other
suspect systems.
Yes
GO to J3 .
No
INSPECT the wheel
bearings. ADJUST or
REPAIR as necessary.
TEST the system for
normal operation.
Yes
CORRECT the
condition that caused
the abnormal wear.
INSTALL new tire(s).
TEST the system for
normal operation.
No
GO to J4 .
Yes
GO to J5 .
No
CHECK the wheel and
tire balance.
CORRECT as
necessary. TEST the
system for normal
operation.