Page 209 of 312

3 (Third)
Transmission operates in third gear only.
Used for improved traction on slippery roads. Selecting 3 (Third)
provides engine braking.
2 (Second)
Transmission operates in 2nd gear only.
Use 2 (Second) to start-up on slippery roads or to provide additional
engine braking on downgrades.
1 (First)
•Transmission operates in 1st gear only.
•Provides maximum engine braking.
•Allows upshifts by moving gearshift lever.
•Will not downshift into 1 (First) at high speeds; allows for 1 (First)
when vehicle reaches slower speeds.
Forced downshifts
•Allowed in D (Drive) only.
•Depress the accelerator to the floor.
•Allows transmission to select an appropriate gear.
If your vehicle gets stuck in mud or snow
If your vehicle gets stuck in mud or snow, it may be rocked out by
shifting between forward and reverse gears, stopping between shifts in a
steady pattern. Press lightly on the accelerator in each gear.
Do not rock the vehicle if the engine is not at normal operating
temperature or damage to the transmission may occur.
Do not rock the vehicle for more than a minute or damage to the
transmission and tires may occur, or the engine may overheat.
If your vehicle is equipped with AdvanceTracwith RSC, it may be
beneficial to turn the system off so the wheels are allowed to spin.
2007 Navigator(nav)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
209
Page 210 of 312

REVERSE SENSING SYSTEM
The reverse sensing system sounds a tone to warn the driver of obstacles
near the rear bumper when the R (Reverse) gear is selected.
To help avoid personal injury, please read and understand the
limitations of the reverse sensing system as contained in this
section. The park assist is only an aid for some (generally large and
fixed) objects when moving in reverse on a flat surface at “parking
speeds”. Inclement weather may also affect the function of the RSS;
this may include reduced performance or a false activation.
To help avoid personal injury, always use caution when in R
(Reverse) and when using the reverse sensing system.
This system is not designed to prevent contact with small or moving
objects. The system is designed to provide a warning to assist the
driver in detecting objects to avoid damaging the vehicle. The system may
not detect smaller objects, particularly those close to the ground.
Certain add-on devices such as large trailer hitches, bike or
surfboard racks and any device that may block the normal
detection zone of the reverse sensing system may create false beeps.
The system will assist the driver in detecting certain objects while the
vehicle moves in reverse at speeds less than 6 mph (10 km/h). The
system is not effective at speeds greater than 6 mph (10 km/h) and may
not detect certain angular or moving objects.
The system detects obstacles within approximately 16 feet (five meters), at
speeds above 2.5 mph (4 km/h) behind the rear bumper with a decreased
coverage area at the outer corners of the bumper. If vehicle speed is below
2.5 mph (4 km/h), the system detects obstacles within approximately 9 feet
(2.6 meters) behind the rear bumper with a decreased coverage area at the
2007 Navigator(nav)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
210
Page 211 of 312

outer corners of the bumper. As you move closer to the obstacle, the rate
of the tone increases. When the distance to the obstacle is approximately
less than 18 inches (45.0 cm), the tone will sound continuously. If the
system detects an object that is approaching the vehicle at such a rate that
rapid braking is required, a very high rate tone will sound. If this tone is
heard while reversing, the driver is advised to slow down immediately until
the tone either changes to a slower rate or stops.
Audible Warnings
Distance to Object Warning
Speed above 2.5 mph (4 km/h)
up to 1.6 feet (.5 meters) Solid
1.6 feet (.5 meters) to 3.1 feet (1 meter) Fast beep
3.1 feet (1 meter) to 5.7 feet (1.8 meters) Medium/fast beep
5.7 feet (1.8 meters) to 9 feet (2.8 meters) Medium beep
9 feet (2.8 meters) to 13 feet (4 meters) Medium/slow beep
13 feet (4 meters) to 19.6 feet (6 meters) Slow beep
Speed below 2.5 mph (4 km/h)
up to 1.4 feet (.4 meters) Solid
1.4 feet (.4 meters) to 3 feet (.9 meters) Fast beep
3 feet (.9 meters) to 4.5 feet (1.4 meters) Medium beep
4.5 feet (1.4 meters) to 6.3 feet (1.9 meters) Medium/slow beep
6.3 feet (1.9 meters) to 8.7 feet (2.6 meters) Slow beep
8.7 feet (2.6 meters) to 16.4 feet (5 meters) No sound
The reverse sensing system is automatically enabled when the gear
selector is placed in R (Reverse) and the ignition is ON. A control in the
message center allows the driver to disable the system only when the
ignition is ON and the gear selector is in R (Reverse). Refer toMessage
centerin theDriver Controlschapter.
The message center will indicate the system is OFF and will not allow
the driver to switch the system ON to indicate a failure of the reverse
sensing system.
The radar sensor is located behind the rear bumper/fascia. Always
keep the rear bumper/fascia free from snow, ice and large
accumulations of dirt. These elements may cause the system to
operate inaccurately.
If the vehicle sustains damage to the rear bumper/fascia, leaving
it misaligned or bent, the sensing zone may be altered causing
inaccurate measurement of obstacles or false alarms.
2007 Navigator(nav)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
211
Page 212 of 312

CONTROL TRAC FOUR-WHEEL DRIVE (4X4) OPERATION
(IF EQUIPPED)
For important information regarding safe operation of this type
of vehicle, seePreparing to drive your vehiclein this chapter.
Do not use 4X4 mode on dry, hard surfaced roads. Doing so will produce
excessive noise, increase tire wear and may damage drive components.
4X4 mode is only intended for consistently slippery or loose surfaces.
Use of 4X4 mode on these surfaces may produce some noise (such as
occasional clunks) but will not damage drive components.
Your 4x4 features the heavy-duty Control Trac system which includes a
computer-operated transfer case. This unique system is interactive with
the road, continually monitoring and adjusting torque delivery to the
front and rear wheels to optimize vehicle control.
System indicator messages
The Control Trac system indicator messages display in the reconfigurable
telltale (RTT) location in the message center only under the following
conditions. If these messages display when driving in 4X2, contact your
authorized dealer as soon as possible. Refer toWarning lights and
chimesin theInstrument Clusterchapter.
•4X4 AUTO– displays when 4X4 AUTO is selected.
•4X4– displays when 4X4 is selected.
Positions of the Control Trac system
The Control Trac system functions
in three modes:
•4X2 (2WD)delivers power to
the rear wheels only. This is
appropriate for normal on-road
driving on dry pavement.
•4X4 AUTOprovides electronic
control four-wheel drive with power delivered to all four wheels, as
required, for increased traction. The RTT location in the message
center will display “4X4 AUTO” when this position is selected. This is
appropriate for all on-road driving conditions, such as dry road
surfaces, wet pavement, snow or gravel.
4X24X4
AUTO4X4
2007 Navigator(nav)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
212
Page 213 of 312

•4X4provides electronically locked four-wheel drive power to front and
rear wheels. The RTT location in the message center will display “4X4”
when this position is selected. This position is not recommended for use
on dry pavement. This position is only intended for severe winter or
off-road conditions, such as deep snow, ice or shallow sand.
Utility and four-wheel drive vehicles arenotdesigned 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 or abrupt maneuvers in these vehicles.
Note:The Control Trac selector switch should not be changed while the
rear wheels are slipping.
Shifting between modes
Press any button (4X2, 4X4 AUTO or 4X4) at any forward speed up to
55 mph (88 km/h). The message center may display “4X4 SHIFT IN
PROGRESS” during the system shift. The RTT location in the message
center will then display “4X4 AUTO” if 4X4 AUTO is selected or “4X4” if
4X4 is selected.
Note:Some noise may be heard as the system shifts or engages.
Driving off-road with truck and utility vehicles
Four–wheel drive 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.
The AdvanceTracwith RSC stability enhancement system can be turned
off manually by pressing the AdvanceTracwith RSC button (refer to
AdvanceTracwith Roll Stability Control (RSC) Stability
Enhancement Systemin this chapter) while operating in 4X2, 4X4
AUTO or 4X4 while driving in deep sand, very deep snow or more
strenuous off-road maneuvers. This will disable the engine management
feature, allowing the vehicle to maintain full power and enhanced
momentum through the obstacle.
How your vehicle differs from other vehicles
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.
2007 Navigator(nav)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
213
Page 214 of 312

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.
Basic operating principles
•Do not use 4X4 mode on dry, hard surfaced roads. This may damage
the drivelines and axles.
•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.
If your vehicle goes off the edge of the pavement
•If your vehicle goes off the edge of the pavement, slow down, but
avoid severe brake application. Ease the vehicle back onto the
pavement only after reducing your speed. Do not turn the steering
wheel too sharply while returning to the road surface.
•It may be safer to stay on the apron or shoulder of the road and slow
down gradually before returning to the pavement. You may lose
control if you do not slow down or if you turn the steering wheel too
sharply or abruptly.
•It often may be less risky to strike small objects, such as highway
reflectors, with minor damage to your vehicle rather than attempt a
sudden return to the pavement which could cause the vehicle to slide
sideways out of control or roll over. Remember, your safety and the
safety of others should be your primary concern.
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 arenot
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. 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.
2007 Navigator(nav)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
214
Page 215 of 312

If your vehicle gets stuck
If your vehicle gets stuck in mud or snow it may be rocked out by
shifting between forward and reverse gears, stopping between shifts, in a
steady pattern. Press lightly on the accelerator in each gear.
Do not rock the vehicle if the engine is not at normal operating
temperature or damage to the transmission may occur.
Do not rock the vehicle for more than a few minutes or damage
to the transmission and tires may occur or the engine may
overheat.
Always set the parking brake fully and make sure the gearshift is
latched in P (Park). Turn the ignition to the LOCK position and
remove the key whenever you leave your vehicle.
If the parking brake is fully released, but the brake warning lamp
remains illuminated, the brakes may not be working properly.
See your authorized dealer.
Do not spin the wheels at over 35 mph (56 km/h). The tires may
fail and injure a passenger or bystander.
Emergency maneuvers
•In an unavoidable emergency situation where a sudden sharp turn
must be made, remember to avoid “over-driving” your vehicle, i.e.,
turn the steering wheel only as rapidly and as far as required to avoid
the emergency. Excessive steering will result in less vehicle control,
not more. Additionally, smooth variations of the accelerator and/or
brake pedal pressure should be utilized if changes in vehicle speed are
called for. Avoid abrupt steering, 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.
2007 Navigator(nav)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
215
Page 216 of 312

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 arenot
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. 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.
•If the vehicle goes from one type of surface to another (i.e., 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.
Control Trac four–wheel drive system (if equipped)
When a four–wheel drive mode is selected, the Control Trac system uses
all four wheels to power the vehicle. This increases traction, enabling
you to 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. On
four–wheel drive vehicles, the transfer case allows you to select
four–wheel drive when necessary. Information on transfer case operation
and shifting procedures can be found in this chapter. Information on
transfer case maintenance can be found in theMaintenance and
Specificationschapter. You should become thoroughly familiar with this
information before you operate your vehicle.
Normal characteristics
On some four–wheel drive 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 engaging the front wheels, and is not cause for
concern.
Sand
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.
Note:If air is released from your tires, the Tire Pressure Monitoring
System (TPMS) indicator light may illuminate.
2007 Navigator(nav)
Owners Guide (post-2002-fmt)
USA(fus)
Driving
216