Ford 2003 Mustang Workshop Manual page 2635

Bearing failure
Other
component
leaking.
False report.
Internal
components.
Fill and drain
plugs.
Other part
failure.
Raceways or
rollers.
Lubricant.
Towing vehicle
further than 80
km (50 miles)
with driveshaft
installed.
Mainshaft
tapered bearing
and needle
caged bearings
are especially
susceptible to
damage.
Vibration break-
up of retainer
and brinelling of
races.
Bearing(s).
IDENTIFY leaking fluid
as engine, power
steering, or transmission
fluid. REPAIR as
necessary.
REMOVE 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 .
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 .
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 .
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 .
DETERMINE the cause
of vibration and
CORRECT. Otherwise
PROCEED as above.