Ford 2003 Mustang Workshop Manual page 2632

Excessive noise
Transmission difficult to
shift
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.
Pilot bearing
worn or
damaged.
Excessive
crankshaft end
play.
Lubricant.
Internal shift
mechanism.
Sliding gears,
synchronizers.
Housings, shaft.
Loose pressure
plate to flywheel
bolts.
Lubricant.
Go To Pinpoint Test G
ADD or DRAIN AND
FILL with specified
lubricant.
CHECK the internal shift
mechanism for smooth
operation. REPAIR or
INSTALL a new
mechanism as
necessary.
CHECK for free
movement of gears and
synchronizers. REPAIR
or INSTALL new
components as
necessary.
CHECK 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 .
CHECK for loose bolts
at the pressure plate.
INSTALL new
components as
necessary. REFER to
Section 308-01 .
ADD or DRAIN AND
FILL with specified
lubricant.
.