2003 FORD MUSTANG wheel alignment

15. Connect the parking brake cable and conduit to the parking brake levers.
16. Install the driveshaft. For additional information, refer to
Section 205 - 01 .
17. Install both mufflers. For additional information, refer to Section 309 - 00 .
18. Install both wheel and tire assemblies. For additional information, refer to Section 204 - 04 .
19. Remove the jack stand from the No. 1 crossmember.
20. Bleed the brake system. For additional information, refer to Section 206 - 00 .
21. Check wheel alignment. Adjust if necessary. For additional information, refer to Section 204 - 00 . Klj . 8 ba
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DIAGNOSIS AND TESTING
Wheels And Tires
Inspection and Verification
WARNING: A vehicle equipped with a Traction- Lok® differential will always have both
wheels driving. If, while the vehicle is being serviced, only one wheel is raised off the ground
and the rear axle is driven by the engine, the wheel on the ground could drive the vehicle off
the stand or jack. Be sure both rear wheels are off the ground.
WARNING: Never run the engine with one wheel off the ground, for example, when
changing a tire. The wheel(s) resting on the ground could cause the vehicle to move.
WARNING: Do not balance the wheels and tires while they are mounted on the vehicle.
Possible tire disintegration or differential failure could result, causing personal injury and
extensive component damage. Use off- vehicle wheel and tire balancer only.
Be sure to follow the warnings when carrying out inspection and verification.
Road Test
Verify the customer concern by carrying out a road test on a smooth road. If any vibrations are
apparent, refer to Section 100 - 04 .
To maximize tire performance, inspect for signs of incorrect inflation and uneven wear, which may
indicate a need for balancing, rotation, or front suspension alignment.
Correct tire pressure and driving techniques have an important influence on tire life. Heavy cornering,
excessively rapid acceleration and unnecessary sharp braking increases tire wear.
Replacement tires must follow the recommended:
ztire sizes.
z speed rating.
z load range.
z tire construction type.
Use of any other tire size or type can seriously affect:
zride.
z handling.
z speedometer/odometer calibration.
z vehicle ground clearance.
z tire clearance between the body and chassis.
SECTION 204-
04: Wheels and Tires 2003 Mustang Workshop Manual Klj . 1 ba
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z
wheel bearing life.
z brake cooling.
New wheels need to be installed when vehicle's wheels:
zare bent.
z are cracked.
z are dented.
z are heavily corroded.
z are leaking.
z have elongated wheel hub bolt holes.
z have excessive lateral or radial runout.
Wheel and tire assemblies are attached by six wheel nuts.
It is mandatory to use only the tire sizes recommended on the tire chart attached to the vehicle. Larger
or smaller tires can damage the vehicle, affect durability, and require changing the speedometer
calibration. Make sure wheel size and offsets match those recommended for the tire in use. 1. Inspect for signs of uneven wear that may indicate a need for balancing, rotation, front suspension alignment, damaged tie- rod, or steering components.
2. Check tires for: zcuts.
z stone bruises.
z abrasions
z blisters.
z embedded objects.
3. Tread wear indicators are molded into the bottom of the tread grooves. Install a new tire when the indicator bands become visible.
Symptom Chart Symptom Chart Condition
Possible Sources Action
z Tires show
excess wear on
edge of tread z
Underinflated tires. zADJUST air pressure
in tires.
z Vehicle overloaded. zRETURN vehicle.
NOTIFY customer of
overload condition.
z High- speed cornering. zRETURN vehicle.
NOTIFY customer of
cause of condition.
z Incorrect ride height. zSET ride height.
z Incorrect wheel alignment. zSET alignment to
specification. REFER Klj . 2 ba
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to
Section 204 - 00 .
z Incorrect tire rotation
intervals. z
ADVISE customer of
condition. ROTATE
tires.
z Tires show
excess wear in
center of tread z
Tires overinflated. zADJUST air pressure.
z Other excessive
tire wear
problems z
Incorrect tire rotation
intervals. z
ADVISE customer of
condition. ROTATE
tires.
z Incorrect tire pressure. zADJUST pressure.
z Loose or leaking shock
absorbers. z
TIGHTEN or INSTALL
new shock absorbers
as necessary.
z Incorrect wheel alignment. zSET alignment to
specification. REFER
to Section 204 - 00 .
z Loose, worn or damaged
suspension components. z
REFER to Section 204 - 00 .
z Wheel and tire assembly
out of balance. z
BALANCE wheel and
tire assembly.
z Excessive lateral or radial
runout of wheel. z
REFER to Section 100 - 04 .
z Wobble or
shimmy z
Damaged wheel bearings. zREFER to Section 204 - 00 .
z Loose or damaged
suspension components. z
REFER to Section 204 - 00 .
z Bent wheel. zINSTALL a new wheel
as necessary.
z Damaged tire. zINSTALL a new tire as
necessary.
z Loose wheel nuts. zTIGHTEN to
specification.
z High- speed
shake z
Wheel hub face/pilot/bolt
circle runout.
z Tires/wheels.
z Wheel bearings.
z Suspension/steering
linkage.
z Engine.
z Transmission.
z Brake discs/imbalance. z
REFER to Section 100 - 04 .
z Vehicle vibration zDriveline — engine.
z Tires. z
REFER to Section 100 - 04 . Klj . 3 ba
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presence of the vibration. If the vibration is not evident, check the non-
driving wheels with a
wheel balancer to rule out imbalance as a possible cause. If required, balance the non- driving
wheels and repeat the road test. If the vibration is still evident, proceed to Step 2.
2. Mark the relative position of the drive wheels to the wheel nuts. Remove the wheels. Install all the nuts in the reversed position and repeat the road speed acceleration. If the vibration is gone,
refer to the tire and wheel runout procedure in Section 204 - 04 . If the vibration persists, proceed
to Step 3.
3. Inspect the driveshaft for signs of physical damage, missing balance weight, undercoating, incorrect seating, wear and binding universal joints. Clean the driveshaft and install new
universal joints or a new driveshaft if damaged. Check the index marks (paint spots) on the rear
of the driveshaft and pinion flange. If these marks are more than one- quarter turn apart,
disconnect the driveshaft and re- index to align the marks as closely as possible. After any
corrections are made, recheck for vibration at the road test speed. If the vibration is gone,
reinstall the wheels and road test. If the vibration persists, proceed to Step 4.
4. Raise the vehicle on a hoist and remove the wheels. Rotate the driveshaft by turning the axle and measure the runout at the front, the center, and the rear of the driveshaft with the indicator.
If the runout exceeds 0.89 mm (0.035 inch) at the front or center, a new driveshaft must be
installed. If the front and center are within this limit, but the rear runout is not, mark the rear
runout high point and proceed to Step 5. If the runout is within the limits at all points, proceed to
Step 7.
5. NOTE: Check the U-joints during re- indexing. If a U-joint feels stiff or gritty, install new U- joints.
Scribe alignment marks on the driveshaft and the pinion flange. Disconnect the driveshaft,
rotate it one-half turn, and reconnect it. Circular pinion flanges can be turned in one- quarter
increments to fine tune the runout condition. Check the runout at the rear of the driveshaft. If it is
still over 0.89 mm (0.035 inch), mark the high point and proceed to Step 6. If the runout is no
longer excessive, check for vibration at the road test speed. If vibration is still present, re- index
the driveshaft slip yoke on the transmission output shaft one- half turn and road test the vehicle.
If the vibration persists, proceed to Step 7.
6. Excessive driveshaft runout may originate in the driveshaft itself or in the pinion flange. To determine which, compare the two high points marked in Steps 4 and 5. If the marks are close
together, within about 25 mm (1 inch), a new shaft must be installed and the vehicle road
tested. Klj . 12 ba
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24. Connect the parking brake cable and conduit to the caliper and parking brake lever. For
additional information, refer to Section 206 - 05 .
25. Repeat the three previous steps for the brake components on the other side of the vehicle.
26. Install the exhaust system. For additional information, refer to Section 309 - 00 .
27. Install the wheels and tires. For additional information, refer to Section 204 - 04 .
28. CAUTION: If refilling the rear axle (4001), first add 118 ml (4 oz) of Additive Friction
Modifier C8AZ- 19B546-A or equivalent meeting Ford specification EST- M2C118-A.
Check the lubricant level. zIf necessary, fill the rear axle housing to the level shown with SAE 75W- 140 High
Performance Rear Axle Lubricant F1TZ-19580- B or equivalent meeting Ford
specification WSL- M2C192-A. The refill capacity is 1.23- 1.37 liters (2.6-2.9 pints).
29. Lower the vehicle.
30. Check, and adjust the wheel alignment as necessary. For additional information, refer to Section 204 - 00 . Klj . 13 ba
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16. Install the wheel and tire assembly. For additional information, refer to
Section 204 - 04 .
17. Lower the vehicle.
18. Check the wheel alignment. Adjust as necessary. For additional information, refer to Section 204 - 00 . Klj . 9 ba
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not machine a new brake disc.
7. For vehicles with a two- piece hub and brake disc assembly:
z Match-mark before disassembly.
z Remove the brake disc.
z Using a die grinder with a mild abrasive (Scotch Brite® type), remove any rust or
corrosion from the hub and brake disc mounting surfaces.
z Align the match- marks and reinstall the brake disc on the hub.
8. CAUTION: Do not use a bench lathe to machine brake discs.
NOTE: The depth of cut must be between 0.10 and 0.20 mm (0.004 and 0.008 inch). Lighter
cuts will cause heat and wear. Heavier cuts will cause poor brake disc surface finish.
Using on- vehicle brake lathe, machine the brake discs. Follow the manufacturer's instructions.
After machining, make sure the brake disc still meets the thickness specification.
9. Using a dial indicator, verify that the brake disc lateral runout is now within vehicle specification.
10. Remove any metal chips.
11. Remove the hub adapter.
12. Remove any remaining metal chips from the machining operation.
13. CAUTION: Do not carry out this step on rear drum- in-hat brake discs.
For vehicles with a two- piece hub and a non drum- in-hat brake disc assembly:
z Remove the brake disc from the hub.
z Remove any remaining metal chips from hub and brake disc mounting surfaces and from
the ABS sensor.
z Apply High Temperature Nickel Anti- Seize Lubricant F6AZ-9L494-AA to the mounting
surfaces.
z Using the match- marks, mount the brake disc on the hub.
14. Install the caliper and check brake operation.
Symptom Chart Symptom Chart
Condition
Possible Sources Action
z The Brakes Pull or
Drift z
Tire air pressure.
z Wheel alignment.
z Brake pads.
z Brake components.
z Suspension
component. z
Go To Pinpoint Test A .
z The Red Brake
Warning Indicator Is z
Instrument cluster.
z Circuit. z
Go To Pinpoint Test B . Klj . 4 ba
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