Ford Mustang (2018 year). Manual — part 69

How Temperature Affects Your Tire
Pressure

The tire pressure monitoring system
monitors tire pressure in each pneumatic
tire. While driving in a normal manner, a
typical passenger tire inflation pressure
may increase about 2–4 psi (14–28 kPa)
from a cold start situation. If the vehicle is
stationary overnight with the outside
temperature significantly lower than the
daytime temperature, the tire pressure may
decrease about 3 psi (21 kPa) for a drop of
30°F (17°C) in ambient temperature. This
lower pressure value may be detected by
the tire pressure monitoring system as
being significantly lower than the
recommended inflation pressure and
activate the system warning light for low
tire pressure. If the low tire pressure
warning light is on, visually check each tire
to verify that no tire is flat. If one or more
tires are flat, repair as necessary. Check
the air pressure in the road tires. If any tire
is under-inflated, carefully drive the vehicle
to the nearest location where air can be
added to the tires. Inflate all the tires to
the recommended inflation pressure.

CHANGING A ROAD WHEEL

(If

Equipped)

WARNINGS

The use of tire sealant may damage
your tire pressure monitoring system
and should only be used in roadside

emergencies. If you must use a sealant, the
Ford Tire Mobility Kit sealant should be
used. The tire pressure monitoring system
sensor and valve stem on the wheel must
be replaced by an authorized dealer after
use of the sealant.

See Tire Pressure Monitoring
System (page 275). If the tire
pressure monitor sensor becomes

damaged, it will no longer function.

Note: The tire pressure monitoring system
indicator light will illuminate when the spare
tire is in use. To restore the full function of
the monitoring system, all road wheels
equipped with tire pressure monitoring
sensors must be mounted on the vehicle.

If you get a flat tire while driving, do not
apply the brake heavily. Instead, gradually
decrease your speed. Hold the steering
wheel firmly and slowly move to a safe
place on the side of the road.

Have a flat serviced by an authorized
dealer in order to prevent damage to the
tire pressure monitoring system sensors.
See Tire Pressure Monitoring System
(page 275). Replace the spare tire with a
road tire as soon as possible. During
repairing or replacing of the flat tire, have
the authorized dealer inspect the tire
pressure monitoring system sensor for
damage.

Dissimilar Spare Wheel and Tire

Assembly Information

WARNING

Failure to follow these guidelines
could result in an increased risk of
loss of vehicle control, injury or death.

If you have a dissimilar spare wheel and
tire, then it is intended for temporary use
only. This means that if you need to use it,
you should replace it as soon as possible
with a road wheel and tire assembly that
is the same size and type as the road tires
and wheels that were originally provided
by Ford. If the dissimilar spare tire or wheel
is damaged, it should be replaced rather
than repaired.

A dissimilar spare wheel and tire assembly
is defined as a spare wheel and tire
assembly that is different in brand, size or
appearance from the road tires and wheels
and can be one of three types:

1. T-type mini-spare: This spare tire
begins with the letter T for tire size and
may have Temporary Use Only molded in
the sidewall.

2. Full-size dissimilar spare with label
on wheel: This spare tire has a label on
the wheel that states: THIS WHEEL AND
TIRE ASSEMBLY FOR TEMPORARY USE
ONLY.

When driving with one of the dissimilar
spare tires listed above, do not:

•

Exceed 50 mph (80 km/h).

•

Load the vehicle beyond maximum
vehicle load rating listed on the Safety
Compliance Label.

•

Use snow chains on the end of the
vehicle with the dissimilar spare tire.

•

Use more than one dissimilar spare tire
at a time.

•

Use commercial car washing
equipment.

•

Try to repair the dissimilar spare tire.

Use of one of the dissimilar spare tires
listed above at any one wheel location can
lead to impairment of the following:
•

Handling, stability and braking
performance.

•

Comfort and noise.

•

Ground clearance and parking at curbs.

•

Winter weather driving capability.

•

Wet weather driving capability.

•

All-wheel driving capability.

3. Full-size dissimilar spare without
label on wheel

When driving with the full-size dissimilar
spare wheel and tire assembly, do not:
•

Exceed 70 mph (113 km/h).

•

Use more than one dissimilar spare
wheel and tire assembly at a time.

•

Use commercial car washing
equipment.

•

Use snow chains on the end of the
vehicle with the dissimilar spare wheel
and tire assembly.

The usage of a full-size dissimilar spare
wheel and tire assembly can lead to
impairment of the following:
•

Handling, stability and braking
performance.

•

Comfort and noise.

•

Ground clearance and parking at curbs.

•

Winter weather driving capability.

•

Wet weather driving capability.

•

All-wheel driving capability.

When driving with the full-size dissimilar
spare wheel and tire assembly additional
caution should be given to:
•

Driving vehicles with a load on the
cargo rack.

Drive cautiously when using a full-size
dissimilar spare wheel and tire assembly
and seek service as soon as possible.

Tire Change Procedure

WARNINGS

When one of the front wheels is off
the ground, the transmission alone
will not prevent your vehicle from

moving or slipping off the jack, even if the
transmission is in park (P) or reverse (R)
for manual transmissions.

To help prevent your vehicle from
moving when you change a tire, be
sure to place the transmission in park

(P) or reverse (R) for manual
transmissions, set the parking brake and
block (in both directions) the wheel that
is diagonally opposite (other side and end
of the vehicle) to the tire being changed.

WARNINGS

Never get underneath a vehicle that
is supported only by a jack. If your
vehicle slips off the jack, you or

someone else could be seriously injured.

Do not attempt to change a tire on
the side of the vehicle close to
moving traffic. Pull far enough off the

road to avoid the danger of being hit when
operating the jack or changing the wheel.

Always use the jack provided as
original equipment with your vehicle.
If using a jack other than the one

provided as original equipment with your
vehicle, make sure the jack capacity is
adequate for the vehicle weight, including
any vehicle cargo or modifications.

Check that the vehicle jack is not
damaged or deformed and the
thread is lubricated and clean.

Passengers should not remain in your
vehicle when the vehicle is being
jacked.

1.

Park on a surface, set the parking brake
and activate the hazard flashers.

2. Place the transmission in park (P) and

turn the engine off. For vehicles with a
manual transmission, place the
transmission in reverse (R) after the
engine is turned off.

E175447

3. Block both the front and rear of the

wheel diagonally opposite the flat tire.
For example, if the left front tire is flat,
block the right rear wheel.

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4. Remove the lug wrench, spare tire and

jack.

5. Remove the center ornament from the

wheel if required to access the lug nuts.

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6. To remove the wrench from the jack,

turn the hex nut on the jack
counterclockwise. This will lower the
jack and loosen the mechanical lock.

7.

Loosen each wheel lug nut one-half
turn counterclockwise but do not
remove them until the wheel is raised
off the ground.