2003 FORD MUSTANG engine

z
Excessive noise zPilot bearing
worn or
damaged.
z Excessive
crankshaft end
play. z
Go To Pinpoint Test G .
z Transmission difficult to
shift z
Lubricant. zADD or DRAIN AND
FILL with specified
lubricant.
z Internal shift
mechanism. z
CHECK the internal shift
mechanism for smooth
operation. REPAIR or
INSTALL a new
mechanism as
necessary.
z Sliding gears,
synchronizers. z
CHECK for free
movement of gears and
synchronizers. REPAIR
or INSTALL new
components as
necessary.
z Housings, shaft. zCHECK for binding
condition between the
input shaft and the
engine crankshaft pilot
bearing or bushing.
REPAIR or INSTALL
new components as
necessary. REFER to
Section 308 - 03A or
Section 308 - 03B .
z Loose pressure
plate to flywheel
bolts. z
CHECK for loose bolts
at the pressure plate.
INSTALL new
components as
necessary. REFER to
Section 308 - 01 .
z NOTE: While verifying
the condition, determine
whether the noise is gear
rollover noise, release
bearing rub or some
other transmission-
related noise. Gear
rollover noise, inherent in
manual transmissions, is
caused by the constant
mesh gears turning at the
engine idle speed while
the clutch is engaged and
the transmission is in
NEUTRAL. Release
bearing rub is sometimes
mistaken for mainshaft
bearing noise. Gear
rollover noise will
disappear when the
clutch is disengaged or
when the transmission is
engaged in gear. z
Lubricant. zADD or DRAIN AND
FILL with specified
lubricant. Klj . 3 ba
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Release bearing rub will
disappear when the
clutch is engaged. In the
event that a bearing is
damaged, the noise is
more pronounced while
engaged in gear under
load or coast than in
NEUTRAL.
Noisy in forward gears
zComponents
grounding out
on the
transmission. z
CHECK for screws,
bolts, etc., of body or
other components
grounding out.
CORRECT as
necessary.
z Components
housing bolts. z
CHECK the torque on
the transmission-to-
flywheel housing bolts
and the flywheel
housing- to-engine block
bolts. TIGHTEN the
bolts to specification.
REFER to Section 308 -
01 .
z Bearings or
gears. z
INSPECT the bearings.
INSPECT the gears and
gear teeth for wear or
damage. INSTALL new
components as
necessary. REFER to
Section 308 - 01 .
z Gears clash when
shifting from one forward
gear to another z
Pilot bearing. zCHECK for a binding
condition between the
input shaft and the
engine crankshaft pilot
bearing. INSTALL new
components as
necessary. REFER to
Section 308 - 01 .
z Gear teeth
and/or
synchronizer. z
REPAIR or INSTALL
new components as
necessary. REFER to
Section 308 - 03A or
Section 308 - 03B .
z Engine idle
speed too high. z
REFER to the
Powertrain
Control/Emissions
Diagnosis (PC/ED)
manual.
z Transmission jumps out
of gear z
Transmission
range selector
lever boot. z
INSTALL a new boot if
exceptionally stiff.
REFER to Section 308 -
03A or
Section 308 -
03B .
z Transmission-to-
engine mounting
bolts. z
TIGHTEN the bolts to
specification. Klj . 4 ba
152003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2308/S3B~us~en~ ...

z
Other
component
leaking. z
IDENTIFY leaking fluid
as engine, power
steering, or transmission
fluid. REPAIR as
necessary.
z False report. zREMOVE all traces of
lube on the exposed
transmission surfaces.
CHECK the vent for free
breathing. OPERATE
the transmission and
INSPECT for new
leakage. REPAIR as
necessary. REFER to
Section 308 - 03A or
Section 308 - 03B .
z Internal
components. z
INSPECT for leaks at
the input shaft bearing
retainer seal and the
shift rail expansion plug.
REFER to Section 308 -
03A or
Section 308 -
03B . INSPECT for leaks
at the top cover gasket.
INSPECT the case for
sand holes or cracks.
REPAIR or INSTALL a
new case as necessary.
REFER to Section 308 -
03A or
Section 308 -
03B .
z Fill and drain
plugs. z
CHECK fill and drain
plugs and bore threads.
REPAIR as necessary.
TIGHTEN plugs to
specified torque value.
REFER to Section 308 -
03A or
Section 308 -
03B .
z Bearing failure zOther part
failure.
z Raceways or
rollers.
z Lubricant.
z Towing vehicle
further than 80
km (50 miles)
with driveshaft
installed.
Mainshaft
tapered bearing
and needle
caged bearings
are especially
susceptible to
damage. z
REMOVE,
DISASSEMBLE and
CLEAN the
transmission. Inspect for
damaged parts and
install new components
as necessary. (Note:
RESET the bearing
preload if any new
tapered bearings are
installed). REFER to
Section 308 - 03A or
Section 308 - 03B .
z Vibration break-
up of retainer
and brinelling of
races.
z Bearing(s). z
DETERMINE the cause
of vibration and
CORRECT. Otherwise
PROCEED as above. Klj . 6 ba
152003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2308/S3B~us~en~ ...

Pinpoint Tests
PINPOINT TEST A: CLUTCH SLIPPAGE
PINPOINT TEST B: CLUTCH CHATTER OR SHUDDER z
Shafts or bore.
z Overloading of
vehicle.
z Incorrect
preload.
z Input shaft oil
dam. z
Install new components
as necessary and verify
the oil dam installation is
correct. REFER to
Section 308 - 03A or
Section 308 - 03B .
CHECK for correct
installation of the snap
ring on the mainshaft
next to the oil dam.
z Oil baffle in the
input bearing
shim pack. z
INSTALL a new oil
baffle, making sure it is
not damaged during
assembly. REFER to
Section 308 - 03A or
Section 308 - 03B .
Test Step Result / Action to Take
A1 INSPECT THE CLUTCH LINKAGE
z
Key in OFF position.
z Block the wheels and apply the parking brake.
z Depress and slowly release the clutch pedal.
z Does the clutch pedal release without
binding? Yes
GO to
A2 .
No
INSPECT the clutch pedal. REFER to
Section 308 - 02 .
A2 CARRY OUT A STALL TEST
z
Key in START position.
z Block the wheels and apply the parking brake.
z Place the transmission in fourth gear.
z Increase the engine speed to 2000 rpm and
slowly release the clutch pedal.
z Does the engine stall within five seconds? Yes
The clutch is not slipping. VERIFY the
customer concern.
No
INSPECT the clutch components for
damage.
Test Step Result / Action to Take
B1 CHECK ENGINE OR TRANSMISSION MOUNTS
z
Inspect all the engine and transmission mounts
for looseness or damage. Refer to Section 303 -
01A or
Section 303 - 01B and
Section 308 - 03A or
Section 308 - 03B .
z Are any of the engine or transmission mounts Yes
TIGHTEN or INSTALL new engine
mounts or transmission mounts. TEST
the system for normal operation. Klj . 7 ba
152003 Mustang Workshop Manual
18. 11. 2011file:///C:/Ford/2000 - 2004/tsocache/SHEF_2308/S3B~us~en~ ...

PINPOINT TEST D: CLUTCH PEDAL PULSATION clutch disengaged and engine idling, move
the shift lever to a position halfway between
REVERSE and NEUTRAL.
z Slowly engage clutch. The transmission will
behave as if it is in NEUTRAL.
z Gear clash can now be heard if an attempt
is made to shift into REVERSE with the
clutch engaged. Reserve can now be
measured.
z While maintaining light pressure on the shift
selector, slowly press the clutch pedal to the
floor. The gear clash will stop and the shift
selector will slide into the REVERSE
position.
z Is there a minimum 19.05 mm (0.750 inch)
clutch pedal reserve? CHECK the clutch pressure plate and clutch
disc. INSTALL a new clutch pressure plate
or clutch disc if necessary. REFER to
Section 308
- 01 . TEST the system for
normal operation. Test Step Result / Action to Take
D1 CHECK THE CLUTCH PEDAL
PULSATION z
Key in START position.
z With the transmission in NEUTRAL,
slowly press the clutch pedal.
z Does the clutch pedal pulsate while
being pressed? Yes
GO to
D2 .
No
VERIFY customer concern. GO to Symptom Chart if necessary.
D2 INSPECT PRESSURE PLATE BOLTS
z
Inspect the pressure plate- to-flywheel
bolts.
z Are any of the pressure plate- to-
flywheel bolts loose? Yes
TIGHTEN or INSTALL new bolts. REFER to
Section 308
- 01 . TEST the system for normal
operation.
No
GO to D3 .
D3 INSPECT THE CLUTCH PRESSURE
PLATE z
Remove the clutch pressure plate.
Refer to Section 308 - 01 .
z INSPECT the clutch pressure plate for
damage. Refer to Pressure Plate Check .
z Are there any signs of damage
present on the clutch pressure plate? Yes
INSTALL a new clutch pressure plate. REFER
to
Section 308 - 01 . TEST the system for normal
operation.
No
GO to D4 .
D4 INSPECT THE CLUTCH DISC
z
Carry out the clutch disc inspection
procedure. Refer to Disc Check .
z Is the clutch disc OK? Yes
GO to
D5 .
No
INSTALL a new clutch disc. REFER to Section 308 - 01 . TEST the system for normal operation.
D5 INSPECT THE FLYWHEEL Klj . 9 ba
152003 Mustang Workshop Manual
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PINPOINT TEST E: CLUTCH RELATED VIBRATIONS z
Inspect the flywheel for damage and
runout. Refer to Flywheel Runout Check .
z Is flywheel OK? Yes
GO to
D6 .
No
TIGHTEN, RESURFACE or INSTALL a new
flywheel as necessary. REFER to Section 308 -
01 . TEST the system for normal operation.
D6 INSPECT RELEASE LEVER
INTERFACE TO PIVOT STUD z
Inspect the release lever and the pivot
stud for damage or misalignment.
z Are there any signs of damage
present or misalignment between the
release lever and pivot stud? Yes
INSTALL a new pivot stud and release lever.
REFER to
Section 308 - 01 . TEST the system
for normal operation.
No
VERIFY customer concern. GO to Symptom Chart if necessary.
Test Step Result / Action to Take
E1 CHECK FOR ENGINE COMPONENT
GROUNDING z
Raise the vehicle on a hoist. Refer to
Section 100 - 02 .
z Check the engine and transmission
mounts for grounding.
z Check for exhaust manifolds or other
engine component grounding on the
body or frame.
z Is there evidence of grounding on
the body or frame? Yes
REPAIR the components as necessary. TEST the
system for normal operation.
No
GO to
E2 .
E2 CHECK FOR ACCESSORY DRIVE
VIBRATIONS z
Key in START position.
z Remove the accessory drive belt.
z Does the vibration stop when the
accessory drive belt is removed
from the engine? Yes
REFER to
Section 303 - 05 to diagnose the
accessory drive belt components.
No
STOP the engine and INSTALL the drive belt. GO
to E3 .
E3 CHECK FOR RELEASE BEARING
NOISE z
Key in START position.
z Depress and hold the clutch pedal.
z Is a whirring, grating, or grinding
noise present only when pedal is
pushed? Yes
INSTALL a new clutch release hub and bearing.
REFER to
Section 308 - 01 .
No
GO to E4 .
E4 INSPECT THE FLYWHEEL
z
Key in OFF position.
z Remove the transmission. Refer to
Section 308 - 03A or
Section 308 - 03B .
z Carry out a flywheel check. Refer to
Flywheel Runout Check . Yes
VERIFY customer concern. GO to
Symptom Chart if necessary.
No Klj . 10 ba
152003 Mustang Workshop Manual
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PINPOINT TEST F: HARD SHIFTING z
Is the flywheel OK? TIGHTEN, RESURFACE or INSTALL a new
flywheel. REFER to
Section 308 - 01 . TEST the
system for normal operation. Test Step Result / Action to Take
F1 CHECK THE CLUTCH RELEASE CABLE
z
NOTE: Check the upper shift boot for twisting.
z NOTE: Check the engine idle speed.
z Inspect the clutch release cable for wear or damage. Make
sure the clutch release cable is correctly routed and that all
the fasteners are installed.
z Are there any fasteners missing or is the cable worn,
damaged or incorrectly routed? Yes
REPAIR or INSTALL a new
clutch release cable as
necessary. TEST the
system for normal
operation.
No
GO to
F2 .
F2 CHECK THE CLUTCH PEDAL
z
Loosen the clutch pedal shaft nut.
z Lift the clutch pedal to the most upward position.
z While holding the clutch pedal in the most upward position,
tighten the nut.
z Was the clutch pedal incorrectly adjusted? Yes
VERIFY customer concern.
TEST the system for
normal operation.
No
GO to
F3 .
F3 CHECK THE CLUTCH PEDAL QUADRANT
z
Pull up on the clutch pedal to the upstop. Pulling up on the
pedal ensures that the quadrant is free to rotate through it's
complete range of motion against the spring load of the
quadrant.
z Is the clutch pedal quadrant binding? Yes
INSTALL a new quadrant.
TEST the system for
normal operation.
No
GO to
F4 .
F4 MEASURE THE CLUTCH RESERVE
NOTE:
Do not check the clutch system after the road test.
Allow the vehicle to cool down before carrying out the clutch
reserve check. NOTE: Remove the floor mat, if equipped, to
allow the clutch pedal to travel to the downstop.
z Install a cable tie to the lower clutch pedal, than attach a
tape measure to the cable tie. Yes
INSTALL a new pressure
plate and clutch disc.
REINSTALL the
transmission. RECHECK
the clutch reserve. TEST
the system of normal
operation.
No
GO to
F5 . Klj . 11 ba
152003 Mustang Workshop Manual
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PINPOINT TEST G: EXCESSIVE NOISE contamination, REPAIR as
necessary. TEST the
system for normal
operation. If the
transmission is still hard to
shift, GO to
F9 .
No
TIGHTEN the bolts to 80
Nm (59 lb- ft). TEST the
system for normal
operation. If the
transmission is still hard to
shift, GO to F9 .
F9 INSPECT THE TRANSMISSION
z
Remove the transmission.
z Disassemble the transmission. Refer to Section 308 - 03B .
z Carry out the following:
zinspect all the shift rails for excessive scuffing or
wear.
z check the interlock pins on the shift rail.
z make sure the interlock bolts are tighten to 31 Nm (23
lb-ft).
z inspect the shift pads for wear or cracking.
z inspect the shift forks for wear or damage.
z check the synchronizer rings (of the affected gear[s])
for wear or damage.
z check the synchronizer hubs (of the affected gear[s])
for wear or damage.
z inspect the clutching teeth of the affected gear.
z Are there any internal components worn or damaged? Yes
INSTALL new components
or REPAIR as necessary.
TEST the system for
normal operation.
No
ASSEMBLE and INSTALL
the transmission. TEST the
system for normal
operation.
Test Step Result / Action to Take
G1 TRANSMISSION NEUTRAL GEAR ROLLOVER TEST
z
Start the engine and let it idle with the transmission in
neutral and the clutch engaged (pedal up). If noise is
excessive, depress the clutch pedal to stop the
transmission input shaft from rotating.
z Does the noise stop when the clutch pedal is
depressed? Yes
INSPECT the clutch component
for damage. REFER to General
Procedures in this section.
No
GO to
G2 .
G2 CHECK THE PILOT BEARING
z
Inspect the pilot bearing for damage. Refer to Bearing .
z Is the pilot bearing OK? Yes
GO to
G3 .
No
INSTALL a new pilot bearing.
REFER to Section 308 - 01 .
G3 CHECK TORSION SPRINGS
z
Inspect the torsion springs for fatigue or breakage.
z Are there any signs of fatigue or breakage? Yes
INSTALL a new clutch disc.
REFER to
Section 308 - 01 .
TEST the system for normal
operation. Klj . 14 ba
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