2003 FORD MUSTANG bolt pattern

from a dead stop
zLoose rear
spring U- bolts. z
INSPECT the rear
suspension. TIGHTEN the
U-bolt nuts to specification.
REFER to Section 204 - 02 .
z Howl— can occur at
various speeds and
driving conditions.
Affected by
acceleration and
deceleration z
Incorrect ring
and pinion
contact,
incorrect
bearing preload
or gear damage. z
CHECK the ring and pinion
and bearings for damage.
INSPECT the ring and
pinion wear pattern. REFER
to Checking Tooth Contact
Pattern and Condition of the
Ring and Pinion component
test in this section. ADJUST
or INSTALL new
components as necessary.
REFER to Section 205 - 02A
for Ford 7.5 rear axles or
Section 205
- 02B for Ford
8.8 integral axles.
z Chuckle— heard at
coast/deceleration.
Also described as a
knock z
Incorrect ring
and pinion
contact or by
damaged teeth
on the coast
side of the ring
and pinion. z
CHECK the ring and pinion
for damage. INSPECT the
ring and pinion wear pattern.
REFER to Checking Tooth
Contact Pattern and
Condition of the Ring and
Pinion component test in
this section. ADJUST or
INSTALL new components
as necessary. REFER to
Section 205 - 02A for Ford
7.5 rear axles or Section 205 - 02B for Ford 8.8
integral axles.
z Knock— noise occurs
at various speeds.
Not affected by
acceleration or
deceleration z
Gear tooth
damage to the
drive side of the
ring and pinion. z
CHECK the differential case
and ring and pinion for
damage. INSTALL new
components as necessary.
REFER to Section 205 - 02A
for Ford 7.5 rear axles or
Section 205
- 02B for Ford
8.8 integral axles.
z Excessive axle
shaft end play.
(Vehicles with
integral axles). z
CHECK the axle end play
using a dial indicator.
INSTALL a new axle shaft
or side 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 Scraping noise— a
continuous low
pitched noise starting
at low speeds z
Worn or
damaged pinion
bearings. z
CHECK the pinion bearings.
INSTALL new pinion
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 Driveline shudder—
occurs during
acceleration from a
slow speed or stop z
Rear drive axle
assembly
mispositioned. z
CHECK the axle mounts
and the rear suspension for
damage or wear. REPAIR
as necessary. Klj . 21 ba
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PINPOINT TEST I: REAR SUSPENSION NOISE z
WARNING: The electrical power to the air
suspension system must be shut off prior to hoisting,
jacking or towing an air suspension vehicle. This can
be accomplished by turning off the air suspension
switch. Failure to do so can result in unexpected
inflation or deflation of the air springs, which can result
in shifting of the vehicle during these operations.
z Raise and support the vehicle.
z Check the steering system for wear or damage. Carry out a
steering linkage test. Refer Section 211 - 00 .
z Inspect the tire wear pattern. Refer to Tire Wear Patterns
chart in this section.
z Are the steering components worn or damaged? REPAIR the steering
system. INSTALL new
components as necessary.
TEST the system for normal
operation.
No
GO to
H3 .
H3 FRONT SHOCK ABSORBER/STRUT CHECK
z
Check the front shock absorbers/strut mounts for loose
bolts or nuts.
z Check the front shock absorbers/struts for wear or damage.
Carry out a "bounce test".
z Are the front shock absorbers/struts loose or
damaged? Yes
TIGHTEN to specifications if
loose. INSTALL new front
shock absorbers/struts if
damaged. TEST the system
for normal operation.
No
GO to
H4 .
H4 CHECK THE FRONT SPRINGS
z
Check the front spring and front spring mounts/brackets for
wear or damage.
z Are the front springs or spring mounts/brackets worn
or damaged? Yes
REPAIR or INSTALL new
components as necessary.
TEST the system for normal
operation.
No
GO to
H5 .
H5 CHECK THE CONTROL ARMS/RADIUS ARMS
z
Inspect the control arm bushings for wear or damage.
z Inspect for twisted or bent control/radius arm.
z Are the control/radius arms damaged or worn? Yes
REPAIR or INSTALL new
components as necessary.
TEST the system for normal
operation.
No
GO to
H6 .
H6 CHECK THE STABILIZER BAR/TRACK BAR
z
Check the stabilizer bar/track bar bushings and links for
damage or wear.
z Check the stabilizer bar/track bar for damage.
z Check for loose or damaged stabilizer bar isolators or
brackets.
z Are the stabilizer bar/track bar components loose, worn
or damaged? Yes
REPAIR or INSTALL new
components as necessary.
TEST the system for normal
operation.
No
Suspension system OK.
CONDUCT diagnosis on
other suspect systems.
Test Step Result / Action to Take Klj . 54 ba
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When these conditions exist, check the driveline angles as described in the General Procedures
portion of this section.
If the tires and driveline angle are not the cause, carry out the NVH tests to determine whether the
concern is caused by a condition in the axle. Refer to
Section 100 - 04 .
Universal Joint (U- Joint) Wear
Place the vehicle on a frame hoist and rotate the driveshaft by hand. Check for rough operation or
seized U- joints. Install a new U- joint if it shows signs of seizure, excessive wear, or incorrect seating.
Refer to Section 205 - 01 .
Wheel Hub or Axle Flange Bolt Circle Runout
NOTE: The brake discs must be removed to carry out all runout measurements.
1. Position the special tool perpendicular to the wheel hub or axle flange bolt, as close to the hub or flange face as possible. Zero the indicator to allow the pointer to deflect either way.
2. Rotate the hub or flange until the next bolt is contacted. Record the measurement and continue until each bolt is checked. The difference between the maximum and minimum contact readings
will be the total wheel hub or axle flange bolt pattern runout. The runout must not exceed 0.38
mm (0.015 inch).
Pilot Runout
1. Position the special tools as close to the hub or axle flange face as possible. Zero the indicator to allow the pointer to deflect either way.
2. Rotate the hub or flange one full turn and note the maximum and minimum readings. The difference between the maximum and minimum readings will be the total pilot runout. Pilot
runout must not exceed 0.15 mm (0.006 inch).
Wheel Hub or Axle Flange Face Runout Klj . 5 ba
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2. Use a box wrench on the ring gear bolts as a lever to rotate the ring gear several complete
revolutions in both directions or until a clear tooth contact pattern is obtained.
3. Certain types of gear tooth contact patterns on the ring gear indicate incorrect adjustment. Incorrect adjustment can be corrected by readjusting the ring gear or the pinion.
Contact Pattern Location
In general, desirable ring gear tooth patterns must have the following characteristics:
zdrive pattern on the drive side ring gear well centered on the tooth
z coast pattern on the coast side ring gear well centered on the tooth
z clearance between the pattern and the top of the tooth
z no hard lines where the pressure is high
Acceptable ring gear tooth patterns for all axles.
Correct backlash with a thinner pinion position shim required.
Correct backlash with a thicker pinion position shim required. Klj . 18 ba
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Lower the rear end of the driveshaft to clear the rear axle housing. Pull the driveshaft rearward
until the driveshaft slip yoke clears the transmission extension housing.
zPlace a paint index mark on the driveshaft slip yoke and the transmission output shaft.
z Place a commercially available plug in the extension housing to prevent fluid leakage.
5. CAUTION: Install the driveshaft with new bolts. If new bolts are not available, apply
threadlock and sealer to the threads of the original bolts.
CAUTION: Do not allow the slip yoke to bottom on the transmission output shaft.
CAUTION: The driveshaft centering socket yoke fits tightly on the rear axle pinion
flange pilot. To make sure that the yoke seats squarely on the flange, tighten the bolts
evenly in a cross pattern as shown.
NOTE: Clean all foreign material from the yoke areas of the driveshaft.
To install, reverse the removal procedure. Klj . 2 ba
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2. Remove the four bolts.
6. CAUTION: The driveshaft centering socket yoke fits tightly on the rear axle pinion
flange pilot. Never hammer on the driveshaft or any of its components to disconnect the
yoke from the flange. Pry only in the area shown, with a suitable tool, to disconnect the
yoke from the flange.
Using a suitable tool as shown, disconnect the driveshaft centering socket yoke from the rear
axle pinion flange.
7. CAUTION: Do not allow the slip yoke to bottom on the transmission output shaft.
Lower the rear end of the driveshaft to clear the rear axle housing. Pull the driveshaft rearward
until the driveshaft slip yoke clears the transmission extension housing. zPlace a paint index mark on the driveshaft slip yoke and the transmission output shaft.
z Place a commercially available plug in the extension housing to prevent fluid leakage.
8. CAUTION: Install the driveshaft with new bolts. If new bolts are not available, apply
threadlock and sealer to the threads of the original bolts.
CAUTION: Do not allow the slip yoke to bottom on the transmission output shaft.
CAUTION: The driveshaft centering socket yoke fits tightly on the rear axle pinion
flange pilot. To make sure that the yoke seats squarely on the flange, tighten the bolts
evenly in a cross pattern as shown.
NOTE: Clean all foreign material from the yoke areas of the driveshaft.
To install, reverse the removal procedure. Klj . 2 ba
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5.
CAUTION: Do not under any circumstance loosen the nut to reduce preload. If it is
necessary to reduce preload, install a new collapsible spacer (4662) and nut.
CAUTION: Remove the special tool while taking preload readings with the Nm
(inch/pound) torque wrench.
Tighten the nut to set the preload.
zRotate the drive pinion occasionally to make sure the differential pinion bearings (4630)
(4621) seat correctly. Take frequent differential pinion bearing torque preload readings by
rotating the drive pinion with a Nm (inch/pound) torque wrench.
z If the preload recorded prior to disassembly is lower than the specification for used
bearings, then tighten the nut to specification. If the preload recorded prior to
disassembly is higher than the specification for used bearings, then tighten the nut to the
original reading as recorded.
z Refer to the torque specification for used differential pinion bearings in the Specifications
portion of this section.
6. CAUTION: Align the index marks.
CAUTION: Install the driveshaft with new bolts. If new bolts are not available, apply
Threadlock and Sealer EOAZ-19554- AA or equivalent meeting Ford specification WSK-
M2G351- A5 to the threads of the original bolts.
CAUTION: The driveshaft centering socket yoke fits tightly on the pinion flange
pilot. To make sure that the yoke seats squarely on the flange, tighten the bolts evenly in
a cross pattern as shown.
Connect the driveshaft. For additional information, refer to Section 205 - 01 . Klj . 4 ba
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M2G351-
A5 to the threads of the original bolts.
CAUTION: The driveshaft centering socket yoke fits tightly on the pinion flange
pilot. To make sure that the yoke seats squarely on the flange, tighten the bolts evenly in
a cross pattern as shown.
Connect the driveshaft. For additional information, refer to Section 205 - 01 .
25. Lower the vehicle. Klj . 13 ba
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