Ford Super Duty (2018 year). Manual — part 94

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Check tire pressures and set tire
inflation per the Tire Label.

•

Check brake pedal operation. Drive
your vehicle 15 ft (4.5 m) back and
forth to remove rust build-up.

•

Check fluid levels (including coolant,
oil and gas) to make sure there are no
leaks, and fluids are at recommended
levels.

•

If you remove the battery, clean the
battery cable ends and check for
damage.

Contact an authorized dealer if you have
any concerns or issues.

GENERAL INFORMATION

Use only approved wheel and tire sizes,
using other sizes could damage your
vehicle. If you change the diameter of the
tires from that fitted at the factory, the
speedometer may not display the correct
speed. Take your vehicle to an authorized
dealer to have the system reprogrammed.
If you intend to change the size of the
wheels from that fitted by the
manufacturer, you can check the suitability
with an authorized dealer.

Additional information related to the
functionality and maintenance of your tires
can be found later in this chapter. See Tire
Care (page 382).

The Ford recommended tire inflation
pressures can be found on the Tire Label,
which is located on the B-pillar or the edge
of the driver's door. This information can
also be found on the Safety Compliance
Certification Label (affixed to either the
door hinge pillar, door-latch post, or the
door edge that meets the door last post;
next to the driver’s seating position).

Ford strongly recommends maintaining
these tire pressures at all times. Failure to
follow the tire pressure recommendations
can cause uneven treadwear patterns,
reduced fuel economy, and adversely
affect the way your vehicle handles.

Note: Check and set the tire pressure at the
ambient temperature in which you are
intending to drive your vehicle and when the
tires are cold.

Note: Check your tire pressures at least
once per month.

Set the pressure for your spare tire to the
highest value given for your vehicle and tire
size combination (if equipped).

Notice to utility vehicle and truck
owners

WARNINGS

Utility vehicles have a significantly
higher rollover rate than other types
of vehicles.

Vehicles with a higher center of
gravity (utility and four-wheel drive
vehicles) handle differently than

vehicles with a lower center of gravity
(passenger cars). Avoid sharp turns,
excessive speed and abrupt steering in
these vehicles. Failure to drive cautiously
increases the risk of losing control of your
vehicle, vehicle rollover, personal injury and
death.

In a rollover crash, an unbelted
person is significantly more likely to
die than a person wearing a seatbelt.

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Do not become overconfident in the
ability of four-wheel drive vehicles.
Although a four-wheel drive vehicle

may accelerate better than a two-wheel
drive vehicle in low traction situations, it
won't stop any faster than two-wheel drive
vehicles. Always drive at a safe speed.

Utility vehicles and trucks handle
differently than passenger cars in the
various driving conditions that are
encountered on streets, highways and
off-road. Utility vehicles and trucks are not
designed for cornering at speeds as high
as passenger cars any more than low-slung
sports cars are designed to perform
satisfactorily under off-road conditions.

Study your owner's manual and any
supplements for specific information about
equipment features, instructions for safe
driving and additional precautions to
reduce the risk of an accident or serious
injury.

Four-wheel drive system

(If Equipped)

A vehicle equipped with four-wheel drive
(when selected) has the ability to use all
four wheels to power itself. This increases
traction which may enable you to safely
drive over terrain and road conditions that
a conventional two-wheel drive vehicle
cannot.

Power is supplied to all four wheels
through a transfer case or power transfer
unit. Four-wheel drive vehicles allow you
to select different modes as necessary. For
information on transfer case operation and
shifting procedures, See Four-Wheel
Drive (page 216). For information on
transfer case maintenance, See
Maintenance (page 329). You should
become thoroughly familiar with this
information before you operate your
vehicle.

On some four-wheel drive vehicles, the
initial shift from two-wheel to four-wheel
drive while the vehicle is moving can cause
a momentary clunk and ratcheting sound.
These sounds are normal and are not
cause for concern.

In four-wheel drive vehicles, the size of the
spare tire relative to the remaining tires can
have an effect on the 4x4 system. If there
is a significant difference between the size
of a spare and the remaining tires,
four-wheel drive functionality may be
limited. See Using Four-Wheel Drive
(page 216).

How your vehicle differs from
other vehicles

Sport utility vehicles and trucks can differ
from some other vehicles in a few
noticeable ways. Your vehicle may be:

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WARNING

Do not become overconfident in the
ability of four-wheel drive vehicles.
Although a four-wheel drive vehicle

may accelerate better than a two-wheel
drive vehicle in low traction situations, it
won't stop any faster than two-wheel drive
vehicles. Always drive at a safe speed.

•

Higher - to allow higher load carrying
capacity and to allow it to travel over
rough terrain without getting hung up
or damaging underbody components.

•

Shorter - to give it the capability to
approach inclines and drive over the
crest of a hill without getting hung up
or damaging underbody components.
All other things held equal, a shorter
wheelbase may make your vehicle
quicker to respond to steering inputs
than a vehicle with a longer wheelbase.

•

Narrower - to provide greater
maneuverability in tight spaces,
particularly in off-road use.

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As a result of the above dimensional
differences, Sport utility vehicles and
trucks often will have a higher center of
gravity and a greater difference in center
of gravity between the loaded and
unloaded condition. These differences that
make your vehicle so versatile also make
it handle differently than an ordinary
passenger car.

TIRE CARE

Information About Uniform
Tire Quality Grading

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Tire Quality Grades apply to new
pneumatic passenger car tires.
The Quality grades can be found
where applicable on the tire
sidewall between tread shoulder
and maximum section width. For
example: Treadwear 200
Traction AA Temperature A.

These Tire Quality Grades are
determined by standards that the
United States Department of
Transportation has set.