2003 FORD MUSTANG brake

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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Component Tests
Driveline Vibration
An analysis of driveline vibration can also be conducted using the Vibration Analyzer; follow the
manufacturer's directions.
Driveline vibration exhibits a higher frequency and lower amplitude than does high-
speed shake.
Driveline vibration is directly related to the speed of the vehicle and is usually noticed at various speed
ranges. Driveline vibration can be perceived as a tremor in the floorpan or is heard as a rumble, hum,
or boom. Driveline vibration can exist in all drive modes, but may exhibit different symptoms depending
upon whether the vehicle is accelerating, decelerating, floating, or coasting. Check the driveline angles
if the vibration is particularly noticeable during acceleration or deceleration, especially at lower speeds.
Driveline vibration can be duplicated by supporting the axle upon a hoist or upon jack stands, though
the brakes may need to be applied lightly in order to simulate road resistance.
1. Raise the vehicle promptly after road testing. Use a twin- post hoist or jack stands to prevent tire
flat- spotting. Engage the drivetrain and accelerate to the observed road test speed to verify the lubricant type.
205 - 02B . CLEAN and
REFILL the axle to
specification.
z Axle overheating zLubricant level too
low. z
CHECK the lubricant level.
FILL the axle to specification.
z Incorrect or
contaminated
lubricant type. z
INSPECT the axle for
damage. REPAIR as
necessary. CLEAN and
REFILL the axle to
specification.
z Bearing preload
adjusted too tight. z
CHECK the ring and pinion for
damage. INSPECT the ring
and pinion wear pattern.
ADJUST the preload as
necessary.
z Excessive gear
wear. z
INSPECT all the axle gears
for wear or damage. INSTALL
new components as
necessary.
z Incorrect ring gear
backlash. z
INSPECT the ring gear for
scoring. INSPECT the ring
and pinion wear pattern.
ADJUST the ring gear
backlash as necessary.
z Broken gear teeth
on the ring gear
or pinion z
Overloading the
vehicle. z
INSTALL a new ring and
pinion. REFER to Section 205 - 02A or
Section 205 - 02B .
z Axle shaft broken zOverloading the
vehicle. z
INSTALL a new axle shaft.
REFER to Section 205 - 02A or
Section 205 - 02B .
z Misaligned axle
shaft tube. z
INSPECT the axle for
damage. CHECK axle shaft
tube alignment. INSTALL a
new axle shaft. REFER to
Section 205 - 02A or
Section 205 - 02B . Klj . 11 ba
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off the floor.
With the engine off, raise only one rear wheel. Install the special tool on the wheel nuts.
Use a torque wrench with a capacity of at least 271 Nm (200 lb-
ft) to rotate the axle shaft. Be sure that
the transmission is in NEUTRAL, and that one rear wheel is on the floor while the other rear wheel is
raised off the floor. The breakaway torque required to start rotation must be at least 27 Nm (20 lb- ft).
The initial breakaway torque may be higher than the continuous turning torque.
The axle shaft must turn with even pressure throughout the check without slipping or binding. If the
torque reading is less than specified, check the differential case. Refer to Section 205 - 02A or
Section 205 - 02B .
Traction- Lok® Differential Check Road Test
1. Place one wheel on a dry surface and the other wheel on ice, mud or snow.
2. Gradually open the throttle to obtain maximum traction prior to break away. The ability to move the vehicle demonstrates correct operation of a Traction- Lok® rear axle assembly.
3. When starting with one wheel on an excessively slippery surface, a slight application of the parking brake may be necessary to help energize the Traction- Lok® feature of the differential.
Release the brake when traction is established. Use light throttle on starting to provide
maximum traction.
4. If, with unequal traction, both wheels slip, the limited slip rear axle has done all it can possibly do.
5. In extreme cases of differences in traction, the wheel with the least traction may spin after the Traction-Lok® has transferred as much torque as possible to the non- slipping wheel. Klj . 15 ba
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4 4222 Differential bearing cup
5 4067 Differential bearing shim
6 4216 Rear axle differential gear case bolt
7 4204 Differential case
8 — Ring gear (part of 4209)
9 — Bearing cap (part of 4010)
10 4010 Rear axle housing
11 373098-
S Filler plug
12 4662 Collapsible spacer
13 4670 Rear axle drive pinion shaft oil slinger
14 4676 Rear axle drive pinion seal
15 4851 Pinion flange
16 389546-S100 Pinion nut
17 4621 Differential pinion bearing
18 2C026 Rear brake disc
19 — Axle shaft flange (part of 4234)
20 2C189 Rear brake anti-
lock sensor indicator 21 2552 Rear disc brake caliper
22 N601951-S2 Bolt
23 N804361-S100 Clip
24 — Bolt
25 2C190 Rear brake anti-
lock sensor 26 2C101 Left hand rear disc brake adapter
27 2C100 Right hand rear disc brake adapter
28 N8015163-S190 Caliper anchor bolt
29 2C028 Rear wheel brake disc shield
30 N602726-S2 Bolt (3 req'd)
31 4616 Differential drive pinion bearing cup
32 4628 Rear axle pinion bearing cup
33 4630 Differential pinion bearing
34 — Drive pinion gear
(part of 4209)
35 4663 Drive pinion bearing adjustment shim
36 — Bolt (part of 4010)
37 4241 Differential pinion shaft lock bolt
38 4211 Differential pinion shaft
39 4N237 U-
washer 40 383548 Bolt
41 — Rear axle identification tag
42 4033 Differential housing cover
43 4230 Differential pinion thrust washer
44 4215 Differential pinion gear Klj . 2 ba
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IN-
VEHICLE REPAIR
Axle Shaft
Removal 1. Raise and support the vehicle. For additional information, refer to Section 100 - 02 .
2. Remove the wheel and tire assembly. For additional information, refer to Section 204 - 04 .
3. Remove the rear brake disc (2C026). For additional information, refer to Section 206 - 04 .
4. Remove the differential housing cover (4033) and drain the lubricant. For additional information, refer to Differential Housing Cover in this section.
5. Remove the differential pinion shaft (4211). 1. Remove the differential pinion shaft lock bolt (4241).
2. Remove the differential pinion shaft.
6. CAUTION: Do not damage the rubber O- ring in the axle shaft groove.
Remove the U- washer (4N237).
1. Push the axle shafts (4234) inboard.
2. Remove the U- washer.
7. CAUTION: Damage to the rear brake anti- lock sensor (2C190) may occur if it is not
removed before the axle shaft.
Carefully remove the rear brake anti- lock sensor. For additional information, refer to Section SECTION 205-
02A: Rear Drive Axle/Differential — Ford 7.5-Inch Ring
Gear 2003 Mustang Workshop
Manual Klj . 1 ba
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1. Position the two U-
washers on the button end of the axle shaft.
2. Pull the axle shaft outward.
4. NOTE: If a new pinion shaft lock bolt is unavailable, coat the threads with Threadlock and
Sealer EOAZ- 19554-AA or equivalent meeting Ford specification WSK-M2G351- A5 prior to
installation.
Install the differential pinion shaft. 1. Align the hole in the differential pinion shaft with the case lock bolt hole.
2. Install a new differential pinion shaft lock bolt.
5. Install the differential housing cover and fill the rear axle with the specified lubrication. For additional information, refer to Differential Housing Cover in this section.
6. Install the rear brake anti- lock sensor. For additional information, refer to Section 206 - 09A .
7. Install the rear brakes. For additional information, refer to Section 206 - 04 .
8. Install the tire and wheel assembly. For additional information, refer to Section 204 - 04 .
9. Lower the vehicle. Klj . 3 ba
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IN-
VEHICLE REPAIR
Drive Pinion Flange and Drive Pinion Seal
Removal 1. Raise and support the vehicle. For additional information, refer to Section 100 - 02 .
2. Remove the rear wheel and tire assemblies. For additional information, refer to Section 204 - 04 .
3. CAUTION: Remove the rear brake calipers to prevent drag during the drive pinion
bearing preload adjustment.
CAUTION: Do not allow the calipers to hang from the brake hoses.
Remove the rear brake caliper and support bracket from the knuckle as an assembly. Wire the
caliper and support bracket assembly out of the way. For additional information, refer to Section 206 - 04 .
4. CAUTION: Index- mark the driveshaft flange and pinion flange (4851) to maintain
initial balance during installation.
CAUTION: The driveshaft centering socket yoke fits tightly on the 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.
Disconnect and position the driveshaft out of the way. For additional information, refer to
SECTION 205-
02A: Rear Drive Axle/Differential — Ford 7.5-Inch Ring
Gear 2003 Mustang Workshop
Manual Special Tool(s)
2-
Jaw Puller
205- D072 (D97L-4221- A) or
equivalent Holding Fixture, Drive Pinion
Flange
205-
126 (T78P-4851- A) Installer, Drive Pinion Flange
205-
002 (TOOL- 4858-E) or
equivalent Klj . 1 ba
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7. Install the rear brake calipers. For additional information, refer to
Section 206 - 04 .
8. Install the rear wheel and tire assemblies. For additional information, refer to Section 204 - 04 .
9. Lower the vehicle. Klj . 5 ba
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