Operating AWD Vehicles With Spare
or Mismatched Tires
WARNING
Only use replacement tires and wheels
that are the same size, load index,
speed rating and type (such as P-metric
versus LT-metric or all-season versus
all-terrain) as those originally provided by
Ford. The recommended tire and wheel size
may be found on either the Safety
Compliance Certification Label (affixed to
either the door hinge pillar, door-latch post,
or the door edge that meets the door-latch
post, next to the driver’ s seating position), or
the Tire Label which is located on the B-Pillar
or edge of the driver’ s door. If this
information is not found on these labels, then
you should contact your authorized dealer
as soon as possible. Use of any tire or wheel
not recommended by Ford can affect the
safety and performance of your vehicle,
which could result in an increased risk of loss
of vehicle control, vehicle rollover, personal
injury and death. A spare tire of a different size other than the
tire provided should never be used. The
AWD system may disable automatically and
enter front-wheel drive only mode to protect
driveline components if a non-full sized tire
is installed. This condition may display an
AWD OFF message in the information
display. If there is an AWD OFF message in
the information display from using a non-full
sized spare tire, this indicator should turn off
after reinstalling the repaired or replaced
normal road tire and cycling the ignition off
and on. It is recommended to reinstall the
repaired or replaced road tire as soon as
possible.
Major dissimilar tire sizes between the front
and rear axles (for example, 17 inch low
profile tires on the front axle and 22 inch high
profile tires on the rear axle) could cause the
AWD system to stop functioning and default
to front-wheel drive or damage the AWD
system. However, the AWD system is
capable of tolerating any combination of new
and worn tires of the same original tire size.
For example, using 3 worn tread tires and 1
new tread tire all of the same original tire
size, can be tolerated by the AWD system. Driving In Special Conditions With All-
Wheel Drive (AWD)
AWD vehicles are equipped for driving on
sand, snow, mud and rough roads and have
operating characteristics that are somewhat
different from conventional vehicles, both on
and off the highway.
When driving at slow speeds in deep sand
under high outside temperatures, use a low
gear when possible. Lower gear operation
will maximize the engine and transmission
cooling capability.
Under severe operating conditions, the A/C
may cycle on and off to protect overheating
of the engine.
Basic operating principles in special
conditions
•
Drive slower in strong crosswinds which
can affect the normal steering
characteristics of your vehicle.
• Be extremely careful when driving on
pavement made slippery by loose sand,
water, gravel, snow or ice.
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(If Equipped)
acceleration or braking which could result
in an increased risk of loss of vehicle
control, vehicle rollover and/or personal
injury. Use all available road surface to
return the vehicle to a safe direction of
travel.
• In the event of an emergency stop, avoid
skidding the tires and do not attempt any
sharp steering wheel movements.
• If the vehicle goes from one type of
surface to another (that is, from concrete
to gravel) there will be a change in the
way the vehicle responds to a maneuver
(steering, acceleration or braking). Again,
avoid these abrupt inputs.
Sand
Most of the time traction control improves
tire traction by managing wheel slip through
Brake, Engine, and AWD calibrations.
However, during low speed driving, disabling
traction control in deep sand can help keep
the wheels moving to maintain vehicle
momentum. When driving over sand, try to keep all four
wheels on the most solid area of the trail.
Avoid reducing the tire pressures but shift
to a lower gear and drive steadily through
the terrain. Apply the accelerator slowly and
avoid spinning the wheels.
Do not drive your vehicle in deep sand for
an extended period of time. This could cause
the AWD system to overheat and default to
front-wheel drive. If this occurs, an AWD OFF
message displays in the information display.
To resume normal AWD function as soon as
possible, stop the vehicle in a safe location
and stop the engine for at least 10 minutes.
After the engine has been restarted and the
AWD system has adequately cooled, the
AWD OFF message turns off and normal
AWD function returns. In the event the
engine is not stopped, the
AWD OFF
message turns off when the system cools
and normal AWD function returns.
When driving at slow speeds in deep sand
under high outside temperatures, use L (Low)
gear when possible. L (Low) gear operation
will maximize the engine and transmission
cooling capability. Under severe operating conditions, the A/C
may cycle on and off to protect overheating
of the engine.
Avoid excessive speed because vehicle
momentum can work against you and cause
the vehicle to become stuck to the point that
assistance may be required from another
vehicle. Remember, you may be able to back
out the way you came if you proceed with
caution.
Mud and Water
If you must drive through high water, drive
slowly. Traction or brake capability may be
limited.
When driving through water, determine the
depth; avoid water higher than the bottom
of the wheel rims (for cars) or the bottom of
the hubs (for trucks) (if possible) and proceed
slowly. If the ignition system gets wet, the
vehicle may stall.
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(If Equipped)
ESSENTIAL TOWING CHECKS
Follow these guidelines for safe towing:
•
Do not tow a trailer until you drive your
vehicle at least 1000 miles (1600
kilometers).
• Consult your local motor vehicle laws for
towing a trailer.
• See the instructions included with towing
accessories for the proper installation
and adjustment specifications.
• Service your vehicle more frequently if
you tow a trailer. See your scheduled
maintenance information.
• If you use a rental trailer, follow the
instructions the rental agency gives you.
You can find information on load
specification terms found on the tire label
and Safety Compliance label as well as
instructions on calculating your vehicle's load
in the Load Carrying chapter. See Load Limit
(page 258).
Remember to account for the trailer tongue
weight as part of your vehicle load when
calculating the total vehicle weight. Hitches
Do not use a hitch that either clamps onto
the bumper or attaches to the axle.
Distribute the trailer load so 10-15% of the
total trailer weight is on the tongue.
Safety Chains
Note:
Never attach safety chains to the
bumper.
Always connect the safety chains to the hook
retainers of your vehicle hitch.
To connect the safety chains, cross them
under the trailer tongue and allow enough
slack for turning tight corners. Do not allow
the chains to drag on the ground.
Trailer Brakes WARNING
Do not connect a trailer's hydraulic
brake system directly to your vehicle's
brake system. Your vehicle may not have
enough braking power and your chances of
having a collision greatly increase. Electric brakes and manual, automatic or
surge-type trailer brakes are safe if you install
them properly and adjust them to the
manufacturer's specifications. The trailer
brakes must meet local and federal
regulations.
The rating for the tow vehicle's braking
system operation is at the gross vehicle
weight rating, not the gross combined
weight rating.
Separate functioning brake systems are
required for safe control of towed vehicles
and trailers weighing more than 1500
pounds (680 kilograms) when load.
Trailer Lamps
WARNING
Never connect any trailer lamp wiring
to the vehicle's tail lamp wiring; this
may damage the electrical system resulting
in fire. Contact your authorized dealer as
soon as possible for assistance in proper
trailer tow wiring installation. Additional
electrical equipment may be required. 265
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TIRE CARE
Important Information About Low-
Profile Tires
If your vehicle is equipped with
245/40R20 tires, they are low-profile
tires. These tires and wheels are
designed to give your vehicle a sport
appearance. With low-profile tires, you
may notice an increase in road noise
and faster tire wear, depending on road
conditions and driving styles. Due to
their design, low-profile tires and wheels
are more prone to road damage from
potholes, rough or unpaved roads, car
wash rails and curb contact than
standard tires and wheels.
Note:
Your vehicle's warranty does not
cover these types of damages. Extra
caution should be taken when operating
on rough roads to avoid impacts that
could cause wheel and tire damage. Information About Uniform Tire Quality
Grading
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. Tire Quality Grades apply to new
pneumatic passenger car tires. They do
not apply to deep tread, winter-type
snow tires, space-saver or temporary
use spare tires, light truck or LT type
tires, tires with nominal rim diameters of
10 to 12 inches or limited production tires
as defined in Title 49 Code of Federal
Regulations Part 575.104 ©)(2).
U.S. Department of Transportation Tire
quality grades: The U.S. Department of
Transportation requires Ford Motor
Company to give you the following
information about tire grades exactly as
the government has written it.
Treadwear
The treadwear grade is a comparative
rating based on the wear rate of the tire
when tested under controlled conditions
on a specified government test course.
For example, a tire graded 150 would
wear 1 ½ times as well on the
government course as a tire graded 100.
The relative performance of tires
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Information on P Type Tires
P215/65R15 95H is an example of a tire
size, load index and speed rating. The
definitions of these items are listed
below. (Note that the tire size, load index
and speed rating for your vehicle may
be different from this example.) A. P: Indicates a tire, designated by the
Tire and Rim Association, that may be
used for service on cars, sport utility
vehicles, minivans and light trucks.
Note:
If your tire size does not begin with a
letter this may mean it is designated by
either the European Tire and Rim
Technical Organization or the Japan Tire
Manufacturing Association.
B.
215: Indicates the nominal width of
the tire in millimeters from sidewall edge
to sidewall edge. In general, the larger
the number, the wider the tire.
C.
65: Indicates the aspect ratio which
gives the tire's ratio of height to width.
D.
R: Indicates a radial type tire.
E.
15: Indicates the wheel or rim
diameter in inches. If you change your
wheel size, you will have to purchase
new tires to match the new wheel
diameter. F.
95: Indicates the tire's load index. It
is an index that relates to how much
weight a tire can carry. You may find this
information in your owner’ s manual. If
not, contact a local tire dealer.
Note: You may not find this information
on all tires because it is not required by
federal law.
G.
H: Indicates the tire's speed rating.
The speed rating denotes the speed at
which a tire is designed to be driven for
extended periods of time under a
standard condition of load and inflation
pressure. The tires on your vehicle may
operate at different conditions for load
and inflation pressure. These speed
ratings may need to be adjusted for the
difference in conditions. The ratings
range from 81 mph (130 km/h) to 186
mph (299 km/h). These ratings are listed
in the following chart.
Note: You may not find this information
on all tires because it is not required by
federal law.
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K. Maximum Load: Indicates the
maximum load in kilograms and pounds
that can be carried by the tire. See the
Safety Compliance Certification Label
(affixed to either the door hinge pillar,
door-latch post, or the door edge that
meets the door-latch post, next to the
driver's seating position), for the correct
tire pressure for your vehicle.
L.
Treadwear, Traction and
Temperature Grades: •
Treadwear
The treadwear grade is
a comparative rating based on the
wear rate of the tire when tested
under controlled conditions on a
specified government test course.
For example, a tire graded 150 would
wear one and one-half times as well
on the government course as a tire
graded 100.
• Traction:
The traction grades, from
highest to lowest are AA, A, B, and
C. The grades represent the tire's
ability to stop on wet pavement as
measured under controlled
conditions on specified government
test surfaces of asphalt and concrete.
A tire marked C may have poor
traction performance.
• Temperature:
The temperature
grades are A (the highest), B and C,
representing the tire's resistance to
the generation of heat and its ability
to dissipate heat when tested under
controlled conditions on a specified
indoor laboratory test wheel. M.
Maximum Inflation Pressure:
Indicates the tire manufacturers'
maximum permissible pressure or the
pressure at which the maximum load
can be carried by the tire. This pressure
is normally higher than the vehicle
manufacturer's recommended cold
inflation pressure which can 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-latch post, next to
the driver's seating position), or Tire
Label which is located on the B-Pillar or
the edge of the driver’ s door. The cold
inflation pressure should never be set
lower than the recommended pressure
on the vehicle label.
The tire suppliers may have additional
markings, notes or warnings such as
standard load or radial tubeless.
Additional Information Contained on
the Tire Sidewall for LT Type Tires
Note: Tire Quality Grades do not apply
to this type of tire.
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LT type tires have some additional
information beyond those of P type tires;
these differences are described below.
A. LT: Indicates a tire, designated by the
Tire and Rim Association, that is
intended for service on light trucks. B. Load Range and Load Inflation
Limits: Indicates the tire's load-carrying
capabilities and its inflation limits.
C.
Maximum Load Dual lb (kg) at psi
(kPa) cold: Indicates the maximum load
and tire pressure when the tire is used
as a dual; defined as four tires on the
rear axle (a total of six or more tires on
the vehicle).
D.
Maximum Load Single lb (kg) at psi
(kPa) cold: Indicates the maximum load
and tire pressure when the tire is used
as a single; defined as two tires (total)
on the rear axle.
Information on T Type Tires
T145/80D16 is an example of a tire size.
Note: The temporary tire size for your
vehicle may be different from this
example. Tire Quality Grades do not
apply to this type of tire. T type tires have some additional
information beyond those of P type tires;
these differences are described below:
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A. T: Indicates a type of tire, designated
by the Tire and Rim Association, that is
intended for temporary service on cars,
sport utility vehicles, minivans and light
trucks.
B.
145: Indicates the nominal width of
the tire in millimeters from sidewall edge
to sidewall edge. In general, the larger
the number, the wider the tire.
C.
80: Indicates the aspect ratio which
gives the tire's ratio of height to width.
Numbers of 70 or lower indicate a short
sidewall.
D.
D: Indicates a diagonal type tire.
R:
Indicates a radial type tire.
E.
16: Indicates the wheel or rim
diameter in inches. If you change your
wheel size, you will have to purchase
new tires to match the new wheel
diameter. Location of the Tire Label
You will find a Tire Label containing tire
inflation pressure by tire size and other
important information located on the
B-Pillar or the edge of the driver’
s door.
Inflating Your Tires
Safe operation of your vehicle requires
that your tires are properly inflated.
Remember that a tire can lose up to half
of its air pressure without appearing flat.
Every day before you drive, check your
tires. If one looks lower than the others,
use a tire gauge to check pressure of all
tires and adjust if required.
At least once a month and before long
trips, inspect each tire and check the tire
pressure with a tire gauge (including
spare, if equipped). Inflate all tires to the
inflation pressure recommended by Ford
Motor Company. You are strongly urged to buy a reliable
tire pressure gauge, as automatic
service station gauges may be
inaccurate. Ford recommends the use
of a digital or dial-type tire pressure
gauge rather than a stick-type tire
pressure gauge.
Use the recommended cold inflation
pressure for optimum tire performance
and wear. Under-inflation or
over-inflation may cause uneven
treadwear patterns
WARNING
Under-inflation is the most common
cause of tire failures and may result
in severe tire cracking, tread separation
or blowout, with unexpected loss of
vehicle control and increased risk of
injury. Under-inflation increases sidewall
flexing and rolling resistance, resulting
in heat buildup and internal damage to
the tire. It also may result in unnecessary
tire stress, irregular wear, loss of vehicle
control and accidents. A tire can lose up
to half of its air pressure and not appear
to be flat! 348
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