Ford 2003 Mustang Workshop Manual page 91

Transmission
rumble/growl—noise at
all speeds in forward
gears, more
pronounced in a heavy
acceleration condition
Transfer case whine—
noise at all ranges
Transfer case
growl/rumble—noise at
all ranges (A small
amount of planetary
noise can be heard
when the transfer case
is operated in low
range.)
Transfer case
scraping/grating—
noise at all ranges
Transfer case
howl/hum—noise at all
ranges or high range
only
Transfer case
howl/hum—noise at
low range only
Transfer case
vibration—vibration felt
with vehicle in 4WD
Damaged or worn
transmission
bearing or gears
(high mileage
vehicles).
Incorrect fluid level
or fluid quality.
Worn oil pump.
Under-inflated or
oversized tires.
Damaged or worn
bearings or
planetary gear.
Excessively
stretched drive
chain hitting the
case.
Worn or damaged
sun (input) gear,
clutch pack
(intermediate) gear
or output shaft gear.
Worn or damaged
intermediate gear
and sliding gears
(clutch pack).
Transfer case
mounting.
Driveshaft out of
balance.
Excessive pinion
information, REFER to
Section 205-00 .
REPAIR as necessary.
CHECK transmission
fluid for excessive
metal particles.
REPAIR as necessary.
REFER to Section 308-
03A for T50D
transmissions or
Section 308-03B for
TR3650 transmissions.
CHECK that the
transfer case is filled to
the correct level and
with the specified fluid.
REFER to Section 308-
03A for T50D
transmissions or
Section 308-03B for
TR3650 transmissions.
DISASSEMBLE the
transfer case. CHECK
the oil pump for wear or
damage. REPAIR as
necessary.
CONFIRM that the tires
and wheels are correct
for the vehicle. CHECK
that the tire inflation
pressures are correct.
DISASSEMBLE the
transfer case. CHECK
the bearings or
planetary gear for wear
or damage. REPAIR as
necessary.
DISASSEMBLE the
transfer case. CHECK
the drive chain for wear
or damage. REPAIR as
necessary.
DISASSEMBLE the
transfer case. CHECK
the gears for wear or
damage. REPAIR as
necessary.
DISASSEMBLE the
transfer case. CHECK
the gears for wear or
damage. REPAIR as
necessary.
Go To Pinpoint Test M
.