2003 FORD MUSTANG wheel torque

SPECIFICATIONS
SECTION 205-
02C: Rear Drive Axle/Differential — Ford 8.8-Inch IRS 2003 Mustang Workshop Manual General Specifications
Item Specification
Lubricants/Adhesive/Sealants
Premium Long-
Life Grease XG -1-C ESA-
M1C75- B SAE 75W-
140 High Performance Rear Axle Lubricant F1TZ-
19580- B WSL-
M2C192- A Additive Friction Modifier C8AZ-
19B546-A EST-
M2C118- A Clear Silicone Rubber F7AZ-
19554-CA ESB-
M4G92- A Stud and Bearing Mount EOAZ-19554-
BA WSK-
M2G349- A1 Threadlock and Sealer EOAZ-19554-
AA WSK-
M2G351- A5 High Temperature Nickel Anti-
Seize Lubricant F6AZ-9L494-
AA ESE-
M12A4-A Capacity
Additive Friction Modifier 118 ml (4 oz)
Rear axle lubricant 1.23-
1.37 liters (2.6- 2.9 pints) Rear axle lubricant level 6.35 mm (1/4 inch) from the bottom of
the fill hole Clearance, Tolerance and Adjustments
Maximum carrier spread 0.762 mm (0.030 in)
Maximum differential ring gear backface runout 0.076 mm (0.003 in)
Maximum differential case runout 0.076 mm (0.003 in)
Backlash between differential ring gear and pinion teeth 0.203 mm (0.008 in)-
0.330 mm (0.013
in) Preferred backlash 0.254 mm (0.010 in)
Maximum backlash variation between teeth 0.1016 mm (0.004 in)
Maximum radial runout of rear axle pinion flange in
assembly TIR 0.254 mm (0.010 in)
Available drive pinion bearing adjustment shim in steps of:
0.0254 mm (0.001 in) 0.254 mm (0.010 in)-
0.965 mm (0.038
in) Lubricant deflector to differential housing cover 5.08 mm (0.200 in)-
6.35 mm (0.250 in)
Torque Specifications Description Nm lb-
ft lb-
in Rear axle wheel hub retainer 340 251 —
Driveshaft to pinion flange bolt 112 83 —
Rear axle differential front lower insulator nut and bolt 70 52 —
Rear axle differential rear insulator bolt 103 76 —Klj . 1 ba
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SPECIFICATIONS
SECTION 205-
05: Rear Drive Halfshafts 2003 Mustang Workshop Manual General Specifications
Item Specification
Halfshaft assembled length 817.6 mm (32.19 in)
Torque Specifications Description Nm lb-
ft Tie-
rod end to knuckle 47 35
Shock absorber to suspension lower arm 133 98
Suspension upper arm and bushing to knuckle 90 66
Rear brake anti-
lock sensor bolt 7 5
Rear axle wheel hub retainer 325 240 Klj . 1 ba
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DESCRIPTION AND OPERATION
Rear Drive Halfshafts
The rear wheel drive halfshaft system consists of and operates as follows:
zHalfshafts (4K138) transmit engine torque from the rear axle housing to the rear wheels.
z Halfshafts rotate at approximately one- third the speed of a driveshaft and do not contribute to
rotational vibration disturbances.
z A constant velocity (CV) joint is a mechanism for transmitting uniform torque and rotary motion
while operating through a range of angles.
z CV joints at both inboard (differential) and outboard (wheel) ends provide operating
smoothness.
z The inboard CV joints are plunge- type joints that provide the axial movement necessary to
affect shaft length changes.
z The outboard CV joints have a higher angle capability than the inboard CV joints to
accommodate suspension travel.
z Inboard and outboard CV joints connect to a splined shaft.
z A driveshaft bearing retainer circlip retains the splined inboard CV joint to the differential side
gear. Install a new circlip every time you remove the halfshaft from the vehicle.
z A rear axle wheel hub retainer secures the interconnecting shaft and outboard CV joint to the
rear hub.
z The lubed-for- life CV joints use special CV joint grease. They require no periodic lubrication.
z To separate the halfshaft from the rear hub, press the outboard CV joint from the rear hub.
z To separate the halfshaft from the differential, apply a load to the back face of the inboard CV
joint assembly to overcome the circlip.
z The halfshaft assemblies are not repairable. Install a new assembly if worn/damaged.
SECTION 205-
05: Rear Drive Halfshafts 2003 Mustang Workshop Manual Klj . 1 ba
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GENERAL PROCEDURES
Runout Check —
Brake Disc and Hub
CAUTION: The brake disc (1126) runout specification must be met to ensure correct brake
performance without roughness complaints.
CAUTION: Do not install brake discs that are less than the minimum thickness specified.
Do not machine a brake disc below the minimum thickness specification.
NOTE: When installing brake discs, always align the painted match marks on the brake discs with
those on the front hub or rear axle.
NOTE: When installing brake discs, always apply anti- seize lubricant to the brake disc-to-front hub or
to the brake disc- to-rear axle mating surfaces.
1. Do not remove the tire and wheel assembly. Tighten the wheel nuts to specification with a torque stick or torque wrench.
2. Raise and support the vehicle.
3. Assemble the Brake Measurement Kit, using the spherical tip extension.
4. Locate an opening on the inboard side of the dust shield that will allow the dial indicator tip to be positioned at least 5 mm (0.2 inch) from the outer edge of the brake disc.
5. NOTE: Do not clamp the gauge set to a vehicle component separated from the brake disc by a
flexible joint, such as a ball joint or body mount.
Clamp the Brake Measurement Kit on the vehicle, making sure the flexible indicator arm and
probe tip do not touch the dust shield or tire while rotating.
6. NOTE: For rear wheel measurement only, have an assistant push in on the wheel cover or axle
shaft center while rotating the wheel.
Rotate the wheel for six revolutions, and record the total indicated runout.
SECTION 206-
00: Brake System — General Information 2003 Mustang Workshop Manual Special Tool(s)
Brake Measurement Kit
134-R0199 or equivalent
Material Item Specification
High Temperature Nickel Anti-
Seize Lubricant
F6AZ-
9L494- AA ESE-
M12A4-
A Klj . 1 ba
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SPECIFICATIONS
SECTION 206-
04: Rear Disc Brake 2003 Mustang Workshop Manual General Specifications
Item Specification
Disc brake lining wear limit 1.0 mm (0.040 in)
Disc thickness 15 mm (0.59 in)
Disc lateral runout 0.102 mm (0.004 in)
Disc thickness variation 0.01 mm (0.0004 in)
Hub runout —
Torque Specifications Description Nm lb-
ft lb-
in Rear wheel brake hose-
to-rear disc brake caliper retaining bolt 40 30 —
Rear disc brake support bracket bolts 103 76 —
Brake disc shield bolts 9-
12 — 80-
106 Rear brake pin retainer 33 25 — Klj . 1 ba
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DIAGNOSIS AND TESTING
Anti-
Lock Control — Traction Control
Refer to Wiring Diagrams Cell 42 , Anti-
Lock Brake System for schematic and connector information.
Principles of Operation
The anti- lock-brake control module receives wheel speed readings from each anti- lock brake sensor
and processes this information to determine if an ABS event is necessary. The anti- lock brake sensor
electrically senses each tooth of the anti- lock brake sensor indicators as it passes through the anti- lock
brake sensor's magnetic field.
The anti- lock brake control module continuously monitors and compares the rotational speed of each
wheel and, when it detects an impending wheel lock, modulates brake pressure to the appropriate
brake caliper. This is accomplished by triggering the hydraulic control unit (HCU) to open and close the
appropriate solenoid valves. Once the affected wheel returns to normal speed, the anti- lock brake
control module returns the solenoid valves to their normal position, and normal (base) braking
resumes.
The anti- lock brake control module is self- monitoring. When the ignition switch is turned to the RUN
position, the anti- lock brake control module will do a preliminary electrical check, and at approximately
12 km/h (8 mph) the pump motor is turned on for approximately one half- second. Also during all
phases of operation the anti- lock brake control module (after the vehicle is in motion) checks for
correct operation of the anti- lock brake sensors. Any malfunction of the ABS will cause the ABS to shut
off and ABS warning indicator to illuminate; normal power assisted braking, however, remains.
The ABS control module has the ability to store multiple DTCs in memory.
The traction control system controls wheelspin by modulating the engine torque by communicating to
the powertrain control module (PCM) and by applying, then releasing, the appropriate brake to restore
traction when one or both drive wheels lose traction and begin to spin during acceleration.
The traction control system can be disabled by depressing the traction control switch. The traction
control system will reset and return to normal traction assist when the ignition switch is cycled or when
the traction control switch is depressed again. SECTION 206-
09B: Anti-Lock Control — Traction Control 2003 Mustang Workshop Manual Special Tool(s)
Worldwide Diagnostic System
(WDS)
418-
F224,
New Generation STAR (NGS)
Tester
418- F052, or equivalent scan
tool 73 Digital Multimeter or
equivalent
105-
R0051 Klj . 1 ba
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Poor returnability and sticky steering is used to describe the poor return of the steering wheel to center
after a turn or the steering correction is completed.
Shimmy
Shimmy, as observed by the driver, is large, consistent, rotational oscillations of the steering wheel
resulting from large, side-
to-side (lateral) tire/wheel movements.
Shimmy is usually experienced near 64 km/h (40 mph), and can begin or be amplified when the tire
contacts pot holes or irregularities in the road surface.
Wander
Wander is the tendency of the vehicle to require frequent, random left and right steering wheel
corrections to maintain a straight path down a level road.
Symptom Chart
Symptom Chart Condition
Possible Sources Action
z Hard Steering or
Lack of Assist z
Seized lower steering
column shaft U- joints. z
INSTALL a new lower
steering column shaft.
REFER to Section 211 - 04 .
z Damaged, fractured
steering column
bearing(s). z
REPAIR the steering
column. REFER to
Section 211 - 04 .
z Power steering pump. zGO to Pump Flow and
Pressure Test
Component Test in
this section.
z Suspension
components. z
REFER to Section 204 - 00 for suspension
system diagnosis and
testing.
z Steering gear internal
leakage. z
GO to Pump Flow and
Pressure Test
Component Test in
this section.
z Excessive Steering
Pump Noise z
Power steering pump. zGO to Pump Flow and
Pressure Test
Component Test in
this section.
z Excessive Steering
Wheel Play z
Damaged, loose, or
worn tie- rod end
(3A130). z
GO to the Steering
Linkage Component
Test.
z Loose, worn or
damaged front wheel
spindle tie- rod (3280). z
GO to the Tie- Rod
Articulation Torque
Component Test.
z Damaged/worn
steering gear. z
INSTALL a new
steering gear. REFER
to Section 211 - 02 .
z Loose, worn or
damaged steering z
INSTALL new
steering column Klj . 5 ba
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column bearing(s).
bearing(s). REFER to
Section 211 - 04 .
z Loose, worn or
damaged lower
steering column shaft
U-joint(s). z
INSTALL a new lower
steering column shaft.
REFER to Section 211 - 04 .
z Wander zUnevenly loaded or
overloaded vehicle. z
INFORM the
customer of incorrect
vehicle loading.
z Loose, worn or
damaged front wheel
spindle tie- rod. z
GO to the Tie- Rod
Articulation Torque
Component Test.
z Loose, worn or
damaged tie- rod ends. z
GO to the Steering
Linkage Component
Test.
z Loose or damaged
steering gear mounting
bolts. z
INSTALL new or
TIGHTEN bolts.
REFER to Section 211 - 02 .
z Loose lower steering
column shaft U- joint
bolts. z
TIGHTEN the bolts.
REFER to Section 211 - 04 .
z Loose, worn or
damaged lower
steering column shaft
U-joints. z
INSTALL a new lower
steering column shaft.
REFER to Section 211 - 04 .
z Loose, worn or
damaged steering
column bearing(s). z
INSTALL new
steering column
bearings. REFER to
Section 211 - 04 .
z Suspension
components. z
REFER to Section 204 - 00 for suspension
system diagnosis and
testing.
z Drift/Pull zUnevenly loaded or
overloaded vehicle. z
INFORM the
customer of incorrect
vehicle loading.
z Wheel alignment. zCHECK the wheel
alignment. ADJUST
as required. REFER
to Section 204 - 00 .
z Loose, worn or
damaged front wheel
spindle tie- rod. z
GO to the Tie- Rod
Articulation Torque
Component Test.
z Loose, worn or
damaged tie- rod ends. z
GO to the Steering
Linkage Component
Test.
z Suspension
components. z
REFER to Section 204 - 00 for suspension
system diagnosis and
testing.
z The steering gear valve
effort out of balance. z
GO to Steering Gear
Valve Component
Test in this section.
z Check the brake
system for proper z
REFER to Section 206 - 00 . Klj . 6 ba
112003 Mustang Workshop Manual
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