2003 FORD MUSTANG clutch

or excessive
runout.
z Clutch disc
facing surface
hardened or
damaged.
z Flywheel
surface glazed
or damaged.
z Transmission
input shaft
eccentric or not
perpendicular.
z Clutch drag zClutch drag.
z Cable release
linkage outside
the flywheel
housing worn,
cracked, bent.
z Excessive
runout or
damaged clutch
disc.
z Clutch disc
splines rusted or
worn.
z Loose pressure
plate to flywheel
bolts. z
Go To Pinpoint Test C .
z Clutch pedal pulsation zClutch disc
damaged or
worn.
z Excessive
flywheel runout.
z Loose pressure
plate to flywheel
bolts.
z Improperly
assembled
release lever to
pivot stud. z
Go To Pinpoint Test D .
z Clutch related vibrations zEngine
component
grounding
against frame.
z Loose flywheel
bolts.
z Excessive
flywheel runout.
z Imbalanced
clutch pressure
plate.
z Accessory drive
belt loose or
damaged. z
Go To Pinpoint Test E .
z Hard shifting zManual
transmission
concern.
z Loose pressure
plate to flywheel
bolts. z
Go To Pinpoint Test F . Klj . 2 ba
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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
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z
Crankshaft pilot
bearing. z
INSTALL a new bearing.
z Internal
damage. z
INSPECT the
synchronizer sleeves for
free movement on their
hubs. INSPECT the
synchronizer blocking
rings for widened index
slots, rounded clutch
teeth and smooth
internal surface. CHECK
countershaft cluster gear
for excessive end play.
CHECK shift forks for
worn or loose mounting
on shift rails. INSPECT
the synchronizer sliding
sleeve and the gear
clutch teeth for wear or
damage. REPAIR or
INSTALL a new
component as
necessary.
z Gear teeth. zIf worn or damaged,
INSTALL new gears.
REFER to Section 308 -
03A or
Section 308 -
03B .
z Transmission will not shift
into one gear— all others
OK z
Manual shift
linkage. z
REPAIR or INSTALL
new components as
necessary.
z Backup switch
ball. z
If REVERSE is the
problem, CHECK
backup switch for ball
frozen in extended
position.
z Internal
components. z
INSPECT the shift rail
and fork system,
synchronizer system and
the gear clutch teeth for
restricted travel.
REPAIR or INSTALL
new components as
necessary.
z Transmission is locked in
one gear and cannot be
shifted out of that gear z
Internal
components. z
INSPECT the problem
gears, shift rails, forks
and the synchronizer for
wear or damage.
REPAIR as necessary.
REFER to Section 308 -
03A or
Section 308 -
03B .
z Fork on rail. zCHECK the shift rail
interlock system.
REFER to Section 308 -
03A or
Section 308 -
03B .
z Transmission leaks zLubricant. zCHECK the level and
type. Klj . 5 ba
152003 Mustang Workshop Manual
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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
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PINPOINT TEST C: CLUTCH DRAG loose or damaged? No
GO to
B2 .
B2 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 B3 .
B3 INSPECT PRESSURE PLATE
z
Remove the clutch pressure plate. Refer to
Section 308 - 01 .
z Inspect the clutch pressure plate. Refer to
Pressure Plate Check .
z Are 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 B4 .
B4 CHECK CLUTCH DISC
z
Carry out the clutch disc inspection procedure.
Refer to Disc Check .
z Is the clutch disc OK? Yes
GO to
B5 .
No
INSTALL a new clutch disc. REFER to
Section 308 - 01 . TEST the system for
normal operation. B5 INSPECT THE FLYWHEEL
z
Inspect the flywheel for damage and runout. Refer
to Flywheel Runout Check .
z Is the flywheel OK? Yes
GO to
B6 .
No
REPAIR or INSTALL a new flywheel
as necessary. REFER to Section 308 -
01 . TEST the system for normal
operation. B6 INSPECT THE INPUT SHAFT
z
INSPECT the input shaft for signs of wear or
damage.
z Are any signs of wear or damage present on
the input shaft? Yes
INSTALL a new input shaft. REFER to
Section 308
- 03A or
Section 308 - 03B .
No
VERIFY the customer concerns. GO
to Symptom Chart if necessary.
Test Step Result / Action to Take
C1 CHECK HIGH SHIFTING EFFORTS
z
Key in START position.
z Set parking brake.
z With the shift control selector in REVERSE, Yes
Clutch system OK.
No Klj . 8 ba
152003 Mustang Workshop Manual
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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
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