
SPECIFICATIONS
SECTION 204-
04: Wheels and Tires 2003 Mustang Workshop Manual General Specifications
Item Specification
Lubricants
Silicone Dielectric Compound D7AZ-
19A331-
A ESE-
M1C171- A Cleaners
Liquid Soap ESR-
M99B135- A Professional Choke and Linkage Cleaner
E8AZ-
19A501- AA ESR-
M14P10- A Custom Bright Metal Cleaner
8A-19522-
A ESR-
M5B194- B Aluminum Wheel Repair Compound E7AZ-
19554-
A ESA-
M4G280- A Tire Balance Weight
Max tire balance weight 140g (5 oz) per wheel
70g (2.5 oz) per flange Tire inflation
Tires See safety certification sticker located inside glove
compartment door
Torque Specifications Description Nm lb-
ft Wheel nuts 129 95 Klj . 1 ba
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2.
NOTE: Measure the end play with a Dial Indicator with Bracketry and not by feel.
Knock is also caused by excessive end play in the axle shafts. Up to 0.762 mm (0.030 inch) is
allowed in semi- float axles. The frequency of the knock will be less because the axle shaft
speed is slower than the driveshaft.
Clunk
Clunk is a metallic noise heard when the automatic transmission is engaged in REVERSE or DRIVE.
The noise may also occur when throttle is applied or released. It is caused by backlash somewhere in
the driveline or loose suspension components; it is felt or heard in the axle. Refer to Total Backlash
Check in this section.
Additionally, clunk may be heard upon initial drive- away. This occurs as engine torque shifts vehicle
weight, forcing changes in driveline angles, preventing the driveshaft slip- yoke from sliding on the
output shaft. To correct for this condition, lubricate the slip- yoke splines.
Total Backlash Check 1. Raise and support the vehicle. Refer to Section 100 - 02 .
2. Remove the driveshaft. Refer to Section 205 - 01 .
3. Install the special tool. zClamp a rigid bar or pipe to the tool. Clamp the other end of the bar or pipe to the frame
or a body member in order to prevent movement of the rear axle pinion flange.
4. Lower the vehicle so that one rear wheel is resting on a wheel chock to prevent it from turning. The other rear wheel will be used to measure total rear axle backlash.
5. Rotate the free wheel slowly, by hand, until the feeling of driving the rear axle is encountered. Place a mark on the side of the tire, 305 mm (12 inches) from the center of the wheel, with a Klj . 9 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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Principles of Operation
Evaporative Emission (EVAP) Canister Purge Valve
The EVAP canister purge valve is controlled by the powertrain control module (PCM). The EVAP
canister purge valve controls the flow of fuel vapors from the EVAP canister to the engine intake
manifold during various engine operating modes. The EVAP canister purge valve is normally closed.
Evaporative Emission (EVAP) Canister
Fuel vapors from the fuel tank are stored in the EVAP canister. When the engine is running, the vapors
are purged from the EVAP canister for combustion.
Canister Vent Solenoid
During the Evaporative Emission (EVAP) System Test Monitor, Evaporative Emissions Repair
Verification Drive Cycle, and the Evaporative Emission System Leak Test, the canister vent solenoid is
closed to allow a vacuum to be drawn on the fuel tank at a specific level. The canister vent solenoid is
normally open.
Fuel Tank Pressure (FTP) Sensor
The fuel tank pressure sensor is used to measure the fuel tank pressure during the Evaporative
Emissions Monitor Test. The fuel tank pressure sensor is mounted in the fuel vapor control valve tube
as it crosses over the fuel tank.
Fuel Vapor Control Valve
The fuel vapor control valve is normally between the EVAP canister and the fuel vapor vent valve. Its
function is to prevent the flow of liquid fuel into the EVAP canister or up to the canister purge valve
during refueling, and to prevent the collection of liquid fuel in the fuel vapor hoses by overfilling the fuel
tank.
Fuel Vapor Vent Valve (FVV) Assembly
The fuel vapor vent valve (FVV) assembly is mounted on the top of the fuel tank. It is used to control
the flow of fuel vapors entering the EVAP system. The head portion of the assembly prevents the fuel
tank from overfilling during refueling. The assembly also has a spring float, which prevents liquid fuel
from entering the vapor delivery system under severe handling or vehicle rollover conditions. In the
upright position, the open bottom of the float will lift and shut off the orifice. Under severe handling
conditions, the spring will push the float closed when angles allow liquid fuel to reach the orifice. In a
rollover condition, the weight of the open bottom float and spring pressure will close the orifice.
Fuel Filler Pipe Check Valve
The fuel filler pipe check valve is an intricate part of the fuel filler pipe. It is intended to prevent liquid
fuel from re-entering the fuel filler pipe from the fuel tank on refueling or roll over conditions.
Fuel Filler Cap
The fuel filler cap is used to prevent fuel spill and to close the EVAP system to the atmosphere.
Evaporative Emission System Monitor
When a fault occurs, the EVAP system monitor is reset to NO and a diagnostic trouble code (DTC) is
set in the PCM memory. After the DTC is repaired, the vehicle drive cycle must be completed to reset
the monitor in preparation for inspection and maintenance testing. EVAP Emission System Leak Test Klj . 2 ba
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·
Damaged or incorrectly adjusted ·
Inspect and repair as required. Verify transmission shift
cable adjustment; refer to Section 307 - 05 . Adjust
transmission shift cable as necessary. After repairing
transmission shift cable, verify that the digital TR sensor is
correctly adjusted. Adjust the digital TR sensor as
necessary. Verify Correct Shift Scheduling
and Engagements
·
See Reference/Action ·
Go to the appropriate diagnostic routines. Torque Converter Clutch Always
Applied
·
See Reference/Action ·
Go to Hydraulic/Mechanical Routine 241/341. Torque Converter Clutch
·
Damaged ·
Inspect torque converter. Install a new converter as outlined.
Other Concerns: Noise/Vibration — Forward Or Reverse Possible Component Reference/Action
254 —
ELECTRICAL ROUTINE ·
No Electrical Concerns 354 —
HYDRAULIC/MECHANICAL ROUTINE For Noises/Vibrations That Change With Engine
Speed
·
Converter components/balance weight ·
Locate source of disturbance. Repair as
required. ·
Fluid level (low) pump cavitation ·
Pump assembly ·
Engine drive accessories ·
Cooler lines grounding out ·
Flexplate For Noises/Vibrations That Change With Vehicle
Speed
·
Engine mounts loose or damaged ·
Locate source of disturbance and repair as
required. ·
Driveline concerns:
„ U-joints
„ Rear axle
„ Suspension
„ Modifications
1st Gear: „Low one- way clutch
„ Gearset
„ Friction elements ·
Refer to the following shift routine(s) for
further diagnosis:
„ Shift 1- 2, Routine 320
„ Shift 2- 3, Routine 321
„ Shift 3- 4, Routine 322
„ Shift 4- 3, Routine 323
„ Shift 3- 2, Routine 324
„ Shift 2- 1, Routine 325
„ Torque Converter Cycling 242/342 ·
2nd Gear:
„ Intermediate one- way clutch
„ Intermediate clutch piston bleed hole out of Klj . 28 ba
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DIAGNOSIS AND TESTING
Transmission Cooling
Inspection and Verification
WARNING: Never remove the radiator cap under any conditions while the engine is
operating. Failure to follow these instructions could result in personal injury and/or damage to
the cooling system or engine. To avoid having scalding hot coolant or steam blow out of the
radiator, use extreme care when removing the radiator cap from a hot radiator. Wait until the
engine has cooled, then wrap a thick cloth around the radiator cap and turn it slowly to the first
stop. Step back while the pressure is released from the cooling system. When you are certain
all the pressure has been released, press down on the radiator cap (with a cloth), turn and
remove.
The transmission fluid cooler is integral to the radiator (8005). Whenever leaks or damage to the
radiator are found, install an entire new radiator. For additional information, refer to Section 303 - 03A or
Section 303 - 03B .
Symptom Chart SECTION 307-
02: Transaxle/Transmission Cooling 2003 Mustang Workshop Manual SYMPTOM CHART
Condition
Possible Sources Action
z Transmission
Overheating z
Damaged radiator. zREPAIR or install a new
radiator. For additional
information, REFER to
Section 303 - 03A or
Section 303 - 03B .
z System leaks. zINSPECT for leaks. REPAIR
as necessary.
z Incorrect fluid level. zADJUST to proper level.
z Fluid condition. zINSPECT according to
instructions under Fluid
Condition Check. REFER to
Section 307 - 01 .
z Damaged, blocked,
reversed, leaking or
restricted cooler lines
or cooler tubes. z
INSPECT cooler lines and
tubes. REPAIR or flush as
necessary.
z Engine concerns
causing transmission
to overheat. z
INSPECT engine cooling
system. For additional
information, REFER to
Section 303 - 03A or
Section 303 - 03B .
z Excessive towing
loads. z
CHECK gross vehicle weight.
z Incorrect idle or
performance. z
REFER to the Powertrain
Control/Emissions Diagnosis
(PC/ED) manual. Klj . 1 ba
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Connect an R-
134a A/C service center to the low- and high-pressure service gauge port valves.
3. Recover the refrigerant from the system following the operating instructions provided by the equipment manufacturer.
4. Once the service center has recovered the vehicle A/C system refrigerant, close the service center inlet valve (if equipped). Then switch off the power supply.
5. Allow the vehicle A/C system to remain closed for about two minutes. Observe the system vacuum level as shown on the gauge. If the vacuum does not decrease, disconnect the
refrigerant center hose(s).
6. If the system vacuum does decrease, repeat Steps 2 through 5 until the vacuum level remains stable for two minutes.
7. Carry out the required repairs.
Refrigerant System Evacuation
NOTE: Ford Motor Company recommends use of an A/C service center to carry out recovery,
evacuation, and charging of the refrigerant system. If an A/C service center is not available, refrigerant
system recovery, evacuation, and charging may be accomplished using a separate recovery station,
vacuum pump, charging cylinder, and manifold gauge set.
1. Connect an R- 134a service center to the low- and high-pressure service gauge port valves.
2. Evacuate the system until the low- pressure gauge reads at least 99.4 kPa (29.5 in- Hg) of
vacuum and as close to 101.1 kPa (30 in- Hg) as possible. Continue to operate the vacuum
pump for a minimum of 45 minutes.
3. Turn off the vacuum pump. Observe the low- pressure gauge for five minutes to make sure that
the system vacuum is held. If vacuum is not held for five minutes, leak test the system, service
the leak, and evacuate the system again.
Refrigerant System Charging
NOTE: Ford Motor Company recommends use of an A/C service center to carry out recovery,
evacuation, and charging of the refrigerant system. If an A/C service center is not available, refrigerant
system recovery, evacuation, and charging may be accomplished using a separate recovery station,
vacuum pump, charging cylinder, and manifold gauge set.
1. Correctly oil match the system to verify that the correct amount of refrigerant oil is present in the system. For additional information, refer to Refrigerant Oil Adding in this section.
2. Charge the system with the specified amounts of refrigerant oil and refrigerant.
3. When no more refrigerant is being drawn into the system, start the engine and select MAX A/C operation. Adjust the blower motor speed to the maximum and allow the remaining refrigerant to
be drawn into the system. Continue to add refrigerant into the system until the specified weight
of R- 134a has been added. Close the charging cylinder valve and allow the system to pull any
remaining refrigerant from the hose. When the low- pressure drops to approximately 207 kPa
(30 psi), close the charging hose valve. Klj . 2 ba
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GENERAL PROCEDURES
Refrigerant Identification Testing
1. NOTE: An A/C refrigerant analyzer must be used to identify gas samples taken directly from the
refrigeration system or storage containers prior to recovering or charging the refrigerant system.
Follow the instructions included with the Deluxe Refrigerant Diagnostic Tool to obtain the
sample for testing.
2. The diagnostic tool will display one of the following: zIf the purity level of R- 134a or R-12 is 98% or greater by weight, the green "PASS" light
emitting diode (LED) will light. The weight concentrations of R- 134a, R-12, R-22,
hydrocarbons, and air will be displayed on the digital display.
z If refrigerants R-134a or R- 12 do not meet the 98% purity levels, the red "FAIL" LED will
light and a horn will sound alerting the user of potential hazards. The weight
concentrations of R-134a, R- 12, R-22, and hydrocarbons will be displayed on the digital
display.
z If hydrocarbon concentrations are 2% or greater by weight, the red "FAIL" LED will light,
"Hydrocarbon High" will be displayed on the digital display, and a horn will sound alerting
the user of potential hazards. The weight concentrations of R- 134a, R-12, R-22, and
hydrocarbons will also be displayed on the digital display.
3. The percentage of air contained in the sample will be displayed if the R- 134a or R-12 content is
98% or greater. The diagnostic tool eliminates the effect of air when determining the refrigerant
sample content because air is not considered a contaminant, although air can affect A/C system
performance. When the diagnostic tool has determined that a refrigerant source is pure (R- 134a
or R- 12 is 98% or greater by weight) and air concentration levels are 2% or greater by weight,
the diagnostic tool will prompt the user if an air purge is desired.
4. If contaminated refrigerant is detected, repeat the refrigerant identification test to verify that the refrigerant is indeed contaminated.
5. CAUTION: If contaminated refrigerant is detected, DO NOT recover the refrigerant
into R- 134a or R- 12 recovery/recycling equipment.
Recover any contaminated refrigerant using suitable recovery- only equipment designed for
capturing and storing contaminated refrigerant. For additional information, refer to
Contaminated Refrigerant Handling in this section.
SECTION 412-
00: Climate Control System - General Information 2003 Mustang Workshop Manual Special Tool(s)
Refrigerant Identifier with Air-
Radicator
198-
00003 or equivalent Klj . 1 ba
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