2003 FORD MUSTANG Workshop Manual

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FORD MUSTANG 2003 Workshop Manual Klj . 5 ba
52003 Mustang Workshop Manual
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FORD MUSTANG 2003 Workshop Manual DIAGNOSIS AND TESTING
Transmission Fluid Cooler
CAUTION: Whenever a transmission has been disassembled to install new parts, the
cooler bypass valve (CBV), all transmission fluid coolers (in tank

DIAGNOSIS AND TESTING
Transmission Fluid Cooler
CAUTION: Whenever a transmission has been disassembled to install new parts, the
cooler bypass valve (CBV), all transmission fluid coolers (in tank and auxiliary) and
transmission fluid cooler lines must be cleaned and backflushed. Use a suitable the torque
converter/fluid cooler cleaner.
NOTE: Cleaning and backflushing the transmission fluid cooling system along with following all the
normal cleaning and inspection procedures in this section during disassembly and reassembly will
keep contamination from reentering the transmission and causing a repeat repair.
When internal wear or damage has occurred in the transmission, metal particles, clutch plate material,
or band material may have been carried into the torque converter and transmission fluid cooler. These
contaminants are a major cause of recurring transmission troubles and must be removed from the
system before the transmission is put back into use.
Transmission Fluid Cooler Flow Test
NOTE: The transmission linkage/cable adjustment, fluid level and line pressure must be within
specification before carrying out this test. Refer to Section 307 - 05 for adjustments.
1. Remove fluid level indicator from fluid filler tube.
2. Place funnel in fluid filler tube.
3. Position the vehicle on a hoist. For additional information, refer to Section 100 - 02 .
4. Remove the cooler return line (top fitting) from the fitting on the transmission case.
5. Connect one end of a hose to the cooler return line and route other end of the hose up to a point where it can be inserted into the funnel at the fluid filler tube.
6. Remove the safety stands and lower the vehicle. Insert end of hose into the funnel.
7. Start the engine and run it at idle with the transmission in NEUTRAL.
8. When fluid flows from the hose in a steady stream, a liberal amount of fluid should be observed. "Liberal" is about 1 liter (1 quart) delivered in 15 seconds. If a liberal flow is observed, the test is
complete.
9. If the flow is not liberal, stop the engine. Disconnect the hose from the cooler return line and connect it to the converter outlet fitting (bottom fitting) on the transmission case.
10. Repeat steps 6 and 7. If flow is now approximately 1 liter (1 quart) in 15 seconds, refer to Transmission Fluid Cooler — Backflushing and Cleaning in this section. If the flow is still not
approximately 1 liter (1 quart) in 15 seconds, repair or install pump and or converter.
For the installation of new transmission fluid cooler or tubes, refer to Section 307 - 02 .
SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Klj . 1 ba
22003 Mustang Workshop Manual
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FORD MUSTANG 2003 Workshop Manual Klj . 2 ba
22003 Mustang Workshop Manual
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FORD MUSTANG 2003 Workshop Manual DIAGNOSIS AND TESTING
Diagnosis By Symptom
SECTION 307-
01: Automatic Transaxle/Transmission 2003 Mustang Workshop Manual Special Tool(s)
Transmission Fluid Pressure
Gauge
307-
004 (T57L-77820-

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FORD MUSTANG 2003 Workshop Manual The Diagnosis by Symptom charts give the technician diagnostic information, direction, and suggest
possible components, using a symptom as a starting point.
The Diagnosis by Symptom charts are divid

The Diagnosis by Symptom charts give the technician diagnostic information, direction, and suggest
possible components, using a symptom as a starting point.
The Diagnosis by Symptom charts are divided into two categories: Electrical Routines, indicated by
200 series numbers, and Hydraulic/Mechanical Routines, indicated by 300 series numbers. The
Electrical Routines list the possible electrical components that could cause or contribute to the
symptom described. The Hydraulic/Mechanical Routines list the possible hydraulic or mechanical
components that could cause or contribute to the symptom described.
Diagnosis by Symptom Chart Directions
1. Using the Diagnosis by Symptom Index, select the Concern/Symptom that best describes the condition.
2. Refer to the routine indicated in the Diagnosis by Symptom Index.
3. Always begin diagnosis of a symptom with:
a. preliminary inspections.
b. verifications of condition. c. checking the fluid levels.
d. carrying out other test procedures as directed.
4. NOTE: Not all concerns and conditions with electrical components will set a diagnostic trouble
code (DTC). Be aware that the components listed may still be the cause. Verify correct function
of these components prior to proceeding to the Hydraulic/Mechanical Routine listed.
Begin with the Electrical Routine, if indicated. Follow the reference or action required
statements. Always carry out the on- board diagnostic tests as required. Never skip steps.
Repair as required. If the concern is still present after electrical diagnosis, then proceed to the
Hydraulic/Mechanical Routine listed.
5. The Hydraulic/Mechanical Routines list possible hydraulic or mechanical components that could cause the concern. These components are listed in the removal sequence and by most
probable cause. All components listed must be inspected to ensure correct repair. 105-
R0057 or equivalent UV Leak Detector Kit
164-
R0756 or equivalent
Diagnosis by Symptom Index Title Routines
Electrical
a Hydraulic/
Mechanical Klj . 2 ba
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FORD MUSTANG 2003 Workshop Manual a
Carry out electrical routine first.
Diagnostic Routines Engagement Concerns
No Forward 201 301
No REVERSE 202 302
Harsh REVERSE 203 303
Harsh Forward 204 304
Delayed/Soft Reverse 20

Page 2383 of 4378

FORD MUSTANG 2003 Workshop Manual Condition.
Shift Linkage
·
Damaged or incorrectly
adjusted ·
Inspect and repair as required. Verify transmission shift cable
adjustment; refer to Section 307 - 05 . Adjust transmission shif

Condition.
Shift Linkage
·
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 the digital
transmission range (TR) sensor is correctly adjusted. Adjust the
digital TR sensor as necessary. Incorrect Pressures
·
Low forward clutch
pressure, low line
pressure ·
Check pressure at line and forward clutch tap. Refer to Line Pressure
Chart for specification. If pressures are low, check the following
components: oil filter and seal assembly, main controls, pump
assembly, forward clutch assembly. Fluid Filter and Seal
Assembly
·
Plugged, damaged ·
Install a new filter and seal assembly. ·
Filter seal damaged Main Controls
·
3- 4 shift valve, main
regulator valve, manual
valve — stuck,
damaged ·
Inspect for damage. Repair as required. ·
Bolts not tightened to
specifications ·
Tighten bolts to specifications. ·
Gaskets damaged ·
Inspect gaskets for damage and install a new gasket. ·
2- 3 accumulator and
seals damaged ·
Inspect piston, seals and bore for damage. Repair as required. ·
Pressure regulator
valve ·
Inspect the diameter for wear. Pump Assembly
·
Bolts not tightened to
specifications ·
Tighten bolts to specifications. ·
Porosity/cross
leaks/ball missing or
leaking, plugged hole ·
Inspect for porosity and leaks. Repair as required. ·
No. 3 and No. 4 seal
rings damaged ·
Inspect seals for damage. Repair as required. ·
Gaskets damaged ·
Inspect for damage and install a new gasket. Forward Clutch
Assembly
·
Seals, piston damaged ·
Inspect seals for damage. Repair as required. ·
Check balls damaged,
missing, mislocated,
not seating correctly ·
Inspect for mislocation, poor seating, damage. Install a new cylinder
as required. ·
Friction elements
damaged or worn ·
Check for abnormal wear, damage. Repair as required. One-
Way Clutch
Assembly (Planetary) ·
Worn, damaged or
assembled incorrectly ·
Inspect for damage. Repair as required. Output Shaft Klj . 4 ba
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FORD MUSTANG 2003 Workshop Manual ·
Damaged ·
Inspect for damage. Install new components as required.
Engagement Concern: No Reverse Possible Component Reference/Action
202 —
ELECTRICAL ROUTINE ·
No Electrical Concerns

·
Damaged ·
Inspect for damage. Install new components as required.
Engagement Concern: No Reverse Possible Component Reference/Action
202 —
ELECTRICAL ROUTINE ·
No Electrical Concerns 302 —
HYDRAULIC/MECHANICAL ROUTINE Fluid
·
Incorrect level ·
Adjust fluid to correct level. ·
Condition ·
Inspect condition of fluid. Shift Linkage
·
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. Incorrect Pressures
·
Low reverse clutch
pressure, low reverse band
pressure, low line pressure ·
Check pressure at line pressure tap; refer to Line Pressure Chart
for specifications. If pressures are low, check the following
components: oil filter and seal assembly, main controls, reverse
servo, pump assembly, reverse clutch assembly. Fluid Filter and Seal
Assembly
·
Plugged, damaged ·
Install a new filter and seal assembly. Main Controls
·
No. 6 shuttle ball, manual
valve, main regulator valve,
1- 2 accumulator seals
stuck or damaged ·
Inspect for damage. Repair as required. ·
Loose bolts ·
Tighten bolts to specifications. ·
Gasket damaged ·
Inspect for damage and install a new gasket. Low/Reverse Servo
·
Seals (piston and cover)
damaged ·
Inspect for damage. Repair as required. ·
Servo cover retaining ring
damaged ·
Anchor pins (case)
damaged Pump Assembly
·
Loose bolts ·
Tighten bolts to specifications. ·
Porosity/cross leaks/ball
missing or leaking, plugged
hole ·
Inspect pump assembly. Install new as required. ·
Gasket damaged ·
Inspect for damage and install a new gasket. ·
No. 1 and 2 seal rings
damaged ·
Inspect for damage. Repair as required. Reverse Clutch Assembly Klj . 5 ba
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