2003 FORD MUSTANG automatic transmission fluid

while the pressure is released from the cooling system.
When you are sure all the pressure has been released, turn
and remove the pressure relief cap (still with a cloth).
NOTE:
Allow the engine to cool before checking the engine
coolant level.
z Key in OFF position.
z Visually check the engine coolant level at the degas bottle or
coolant expansion tank.
z Is the engine coolant level within specification? A2 CHECK THE PRESSURE RELIEF CAP
z
Carry out the Cap— 3.8L or Cap—4.6L test. Go to Component
Tests in this section.
z Is pressure relief cap/radiator cap OK? Yes
GO to
A3 .
No
INSTALL a new
pressure relief
cap/radiator cap. TEST
the system for normal
operation. A3 CHECK THE ENGINE COOLANT FOR INTERNAL LEAK
z
Key in OFF position.
z Inspect the engine coolant in degas bottle/coolant expansion
tank for signs of transmission fluid or engine oil.
z Is oil or transmission fluid evident in the coolant? Yes
If engine oil is evident,
REFER to
Section 303 -
00 . If transmission fluid
is evident, REPAIR or
INSTALL a new radiator
as necessary.
No
GO to A4 .
A4 CHECK THE ENGINE AND THE TRANSMISSION FOR
COOLANT z
Remove the oil level dipstick from the engine and the
transmission.
z Is coolant evident in the oil or transmission fluid? Yes
If coolant is in engine,
REFER to
Section 303 -
00 . If coolant is in
transmission, REPAIR
or INSTALL a new
radiator as necessary.
To repair the automatic
transmission, REFER to
Section 307 - 01 .
No
GO to A5 .
A5 PRESSURE TEST THE ENGINE COOLING SYSTEM
z
Pressure test the engine cooling system. Go to Component
Tests in this section.
z Does the engine cooling system leak? Yes
REPAIR or install new
components. TEST the
system for normal
operation.
No
The cooling system is
operational. GO to
Symptom Chart
. Klj . 4 ba
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SPECIFICATIONS
a
MERCON® V is not interchangeable at this time with the current MERCON® fluids. Check the
transmission fluid level indicator to determine the correct fluid and refer to the Workshop/Owner
publication to determine the correct service interval for the specific vehicle. SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual General Specifications
Item Specification
Fluid
a Motorcraft MERCON® V Transmission Fluid XT
-5-QM MERCON®
V Fluid Capacities
3.8L engine 13.2L (13.9 quarts)
4.6L engine 12.0L (12.8 quarts)
Fluid Filter
Inline Transmission Fluid Filter Kit XC3Z-
7B155- AA Inline Transmission Fluid Filter XC3Z-
7B155- BA Lubricant
Ford Multi-Purpose Grease D0AZ-19584-
AA ESB-
M1C93- B
Torque Converter End Play Item Specification
New or remanufactured 0.355-
1.04 mm (0.014- 0.074 in) Used 0.355-
1.87 mm (0.014- 0.074 in)
Band and Clutch Application Chart Gear Overdrive
Band Low
Reverse Band Forward
Clutch Direct
Clutch Interm
Friction Clutch Reverse
Clutch Interm
One-Way
Clutch Planetary
One- Way
Clutch 1st Gear
Manual Low A A H
2nd Gear
Manual Low A A A H
1st Gear —
(D)
(Overdrive) A H
2nd Gear —
(
D)
(Overdrive) A A H
3rd Gear —
(
D)
(Overdrive) A A A O/R
4th Gear —
(
D) A A A O/R Klj . 1 ba
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DESCRIPTION AND OPERATION
Torque Converter
The torque converter transmits and multiplies torque. The torque converter is a four-
element device:
z impeller assembly
z turbine assembly
z reactor assembly
z clutch and damper assembly
The standard torque converter components operate as follows:
zRotation of the converter housing and impeller set the fluid in motion.
z The turbine reacts to the fluid motion from the impeller, transferring rotation to the geartrain
through the input shaft.
z The reactor redirects fluid going back into the impeller, allowing for torque multiplication.
z The clutch and damper assembly dampens powertrain torsional vibration and provides a direct
mechanical connection for improved efficiency.
z Power is transmitted from the torque converter to the planetary gearsets and other components
through the input shaft.
SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Item Part Number Description
1 — Converter clutch and damper (part of 7902)
2 — Reactor (part of 7902)
3 — Turbine (part of 7902) Klj . 1 ba
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DESCRIPTION AND OPERATION
Hydraulic System
Fluid Pump
SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Item Part Number Description
1 7A106 Front pump body assembly
2 7005 Case assembly
3 7A194 Transmission pan
4 7A191 Transmission pan gasket
5 7A098 Fluid filter and seal assembly
6 7A100 Main control assembly
7 7A108 Front pump support assembly
8 7D273 Fluid tube connector assembly (2 req'd)
Item Part Number Description Klj . 1 ba
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DIAGNOSIS AND TESTING
Diagnostic Strategy
Troubleshooting an electronically controlled automatic transmission is simplified by using the proven
method of diagnosis. One of the most important things to remember is that there is a definite
procedure to follow.
NOTE:
Do not take any short cuts or assume that critical checks or adjustments have already been
made.
Follow the procedures as written to avoid missing critical components or steps.
To properly diagnose a concern have the following publications available:
zTransmission Reference Manual.
z Powertrain Control/Emissions Diagnosis (PC/ED) manual.
z TSBs and OASIS Messages.
z Wiring Diagram.
These publications provide the information required when diagnosing transmission concerns.
Use the Diagnostic Flow Chart as a guide and follow the steps as indicated.
Preliminary Inspection
zKnow and understand the customer's concern.
z Verify the concern by operating the vehicle.
z Check the fluid levels and condition.
z Check for non-factory add- on items.
z Check shift linkages for proper adjustment.
z Check TSBs and OASIS messages regarding the concern.
Diagnostics
zCarry out on- board diagnostic procedures key on engine off (KOEO) and key on engine running
(KOER).
z Record all diagnostic trouble codes (DTCs).
z Repair all non- transmission codes first.
z Repair all transmission codes second.
z Erase all continuous codes and attempt to repeat them.
z Repair all continuous codes.
z If only pass codes are obtained, refer to Diagnosis By Symptom for further information and
diagnosis.
Follow the diagnostic sequence to diagnose and repair the concern the first time. SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Klj . 1 ba
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DIAGNOSIS AND TESTING
Diagnostic Flow Chart
SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Diagnostic Flow Chart
z
Know and understand
the customer concerns
z Check the fluid level
and condition
z Verify the concern by
operating the vehicle
z Check for non- factory-
installed items and
verify correct installation
z Check the shift linkage
adjustments
z Check TSBs and
OASIS messages for
vehicle concerns
z Carry out quick test
both KOER and KOEO
z Record all codes
1) Did you record any
diagnostic trouble codes? Yes ·
REPAIR all hard diagnostic trouble codes. FOLLOW the
pinpoint tests. REFER to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual first, then this Workshop Manual. No ·
REFER to Diagnosis By Symptom in this section, then GO to
Step 5. 2) Are any continuous test
memory codes present? Yes ·
CLEAR codes and CARRY OUT drive cycle test. No ·
GO to Step 4. 3) Did the continuous test
memory codes reappear? Yes ·
REPAIR all continuous test memory codes. FOLLOW the
pinpoint tests. REFER to the Powertrain Control/Emissions
Diagnosis (PC/ED) manual then the transmission reference
manual, then this workshop manual, then GO to Step 4. No ·
GO to Step 4. 4) Is the concern repaired? Yes ·
CARRY OUT the final quick test to verify that no diagnostic
trouble codes are present. CLEAR memory codes. No ·
REFER to Diagnosis By Symptom in this section.
5) Are there any electrical
concerns? Yes ·
INSTALL the scan tool and CARRY OUT the output state
control test, then GO to Step 6. No ·
REFER to the hydraulic and mechanical routine to diagnose
and REPAIR the concern, then GO to Step 7. 6) Was the transmission
concern corrected when the
scan tool was installed? Yes ·
REFER to the Powertrain Control/Emissions Diagnosis
(PC/ED) manual, intermittent fault diagnosis section and use
the scan tool to diagnose cause of concern in the processor,
vehicle harness or external inputs (sensors or switches). Klj . 1 ba
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DIAGNOSIS AND TESTING
Preliminary Inspection
The following items must be checked prior to beginning the diagnostic procedures:
Know and Understand the Concern
In order to correctly diagnose a concern, first understand the customer complaint or condition.
Customer contact may be required in order to begin to verify the concern. Understand the conditions,
including when the concern occurs. For example:
zHot or cold vehicle temperature
z Hot or cold ambient temperature
z Vehicle driving conditions
z Vehicle loaded/unloaded
After understanding when and how the concern occurs, proceed to Verification of Condition.
Verification of Condition
This section provides information that must be used in both determining the actual cause of customer
concerns and carrying out the appropriate procedures.
The following procedures must be used when verifying customer concerns for the transmission.
Determine Customer Concern
NOTE: Some transmission conditions can cause engine concerns. An electronic pressure control short
circuit can cause engine misfiring. The torque converter clutch not disengaging will stall the engine.
Determine customer concerns relative to vehicle use and dependent driving conditions, paying
attention to the following items:
zHot or cold vehicle operating temperature
z Hot or cold ambient temperatures
z Type of terrain
z Vehicle loaded/unloaded
z City/highway driving
z Upshifting
z Downshift
z Coasting
z Engagement
z Noise/vibration — check for dependencies, either rpm dependent, vehicle speed dependent,
shift dependent, gear dependent, range dependent, or temperature dependent.
Check Fluid Level and Condition
Fluid Level Check SECTION 307-
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DIAGNOSIS AND TESTING
Diagnostics
SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Special Tool(s)
Transmission Fluid Pressure
Gauge
307-
004 (T57L-77820- A) Air Test Plate, Transmission
307-
246 (T92P-7006- A) Alignment Gauge, TR Sensor
307-
351 (T97L-70010- A) Breakout Box, EEC-V Control
System
418- 049 (T94L-50- EEC-V) or
equivalent MLP-
TR Cable
418- F107 (007- 00111) or
equivalent Worldwide Diagnostic System
(WDS)
418-
F224
New Generation STAR (NGS)
Tester
418- F052 or equivalent scan
tool Transmission Tester
307-
F016 (007- 00130) or
equivalent Trans Tester TR/MLP Overlay Klj . 1 ba
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