2015 LINCOLN NAVIGATOR ground clearance

How Your Vehicle Differs From Other Vehicles
WARNING:Vehicles with a higher center of gravity such as
utility and four-wheel drive vehicles handle differently than
vehicles with a lower center of gravity. Utility and four-wheel drive
vehicles are notdesigned 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. Avoid sharp turns, excessive
speed and abrupt maneuvers in these vehicles. Failure to drive
cautiously could result in an increased risk of loss of vehicle control,
vehicle rollover, personal injury and death.
Truck and utility vehicles can differ from some other vehicles. Your
vehicle may be higher to allow it to travel over rough terrain without
getting hung up or damaging underbody components.
The differences that make your vehicle so versatile also make it handle
differently than an ordinary passenger car.
Maintain steering wheel control at all times, especially in rough terrain.
Since sudden changes in terrain can result in abrupt steering wheel
motion, make sure you grip the steering wheel from the outside. Do not
grip the spokes.
Drive cautiously to avoid vehicle damage from concealed objects such as
rocks and stumps.
You should either know the terrain or examine maps of the area before
driving. Map out your route before driving in the area. To maintain
steering and braking control of your vehicle, you must have all four
wheels on the ground and they must be rolling, not sliding or spinning.
Driving Off-Road With Truck and Utility Vehicles
Note: On some 4WD models, the initial shift from two-wheel drive to
four-wheel drive while the vehicle is moving can cause some momentary
clunk and ratcheting sounds. This is the front drivetrain coming up to
speed and the automatic locking hubs engaging and is not cause for
concern.
Note: Your vehicle may be equipped with a front air dam that can
become damaged (due to reduced ground clearance) when taking your
vehicle off-road. This air dam can be taken off by removing two bolts.
4WD vehicles are specially equipped for driving on sand, snow, mud and
rough terrain and have operating characteristics that are somewhat
different from conventional vehicles, both on and off the road.
Four-Wheel Drive (If Equipped) 181
2015 Navigator(nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)

A dissimilar spare tire and wheel assembly is defined as a spare tire or
wheel 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 TIRE AND WHEEL 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.
• tow a trailer.
• 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 tire and wheel assembly,
do not:
• exceed 70 mph (113 km/h).
• use more than one dissimilar spare tire and wheel at a time.
• use commercial car washing equipment.
• use snow chains on the end of the vehicle with the dissimilar spare
tire and wheel.
Wheels and Tires 319
2015 Navigator(nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)

The usage of a full-size dissimilar spare tire and wheel 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 (if applicable)
• Load leveling adjustment (if applicable)
When driving with the full-size dissimilar spare tire and wheel assembly,
additional caution should be given to:
• towing a trailer.
• driving vehicles equipped with a camper body.
• driving vehicles with a load on the cargo rack.
Drive cautiously when using a full-size dissimilar spare tire and wheel,
and seek service as soon as possible.
Tire Change Procedure
WARNING: When one of the front wheels is off the ground, the
transmission alone will not prevent the vehicle from moving or
slipping off the jack, even if the transmission is in park (P).
WARNING: To help prevent the vehicle from moving when you
change a tire, be sure to place the transmission in park (P), 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.
WARNING: Never get underneath a vehicle that is supported
only by a jack. If the vehicle slips off the jack, you or someone
else could be seriously injured.
320 Wheels and Tires
2015 Navigator(nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)

6. With the vehicle on level ground,
block both sides of the wheel
diagonally opposite (other side and
end of the vehicle) to the wheel
being changed. Do not jack the
vehicle on a hill or incline.
7. Turn off the deployable running boards. See the Driving Aids
chapter.
8. Obtain the spare tire and jack tools from their storage locations.
9. Use the tip of the jack handle to remove any wheel trim.
10. Loosen each wheel lug nut one-half turn counterclockwise but do not
remove them until the wheel is raised off the ground.
11. Position the jack according to
the jack locator arrows found on the
frame and turn the jack handle and
extension tool assembly clockwise.
Note:Use the frame rail as the
jacking location point, not the
control arm.
12. Raise the vehicle to provide sufficient ground clearance when
installing the spare tire, about 1/4 inch (6 millimeters). •Front
Wheels and Tires 323
2015 Navigator(nav)
Owners Guide gf, 2nd Printing, December 2014
USA (fus)