
HOW DOES FOUR-WHEEL DRIVE
WORK
Using the 1-Speed Automatic Four-
Wheel Drive System
The 1-speed automatic four-wheel drive
system utilizes an electronically controlled
on-demand 1-speed transfer case. This
system monitors various vehicle sensory
inputs to provide an increased level of
performance. This system offers the driver
two-wheel drive high, four-wheel drive auto
and four-wheel drive high as available modes
of operation via the selectable drive mode
switch. When four-wheel drive auto is
selected, the system continuously varies
power to the front wheels for optimum
performance for all on-road conditions. When
four-wheel drive high is selected, the system
provides power to the front and rear wheels
for use in off-road or slippery conditions such
as deep snow, sand or mud. There is further
information on driving in unique driving
conditions. See Driving Hints (page 384).
Using the 2-Speed Automatic Four-
Wheel Drive System
(If Equipped)
The 2-speed automatic four-wheel drive
system utilizes an electronically controlled
on-demand 2-speed transfer case. This
system monitors various vehicle sensory
inputs to provide an increased level of
performance. This system offers the driver
two-wheel drive high, four-wheel drive auto,
four-wheel drive high, and four-wheel drive
low as available modes of operation. When
four-wheel drive auto is selected, the system
continuously varies power to the front wheels
for optimum performance for all on-road
conditions. When either four-wheel drive high
or four-wheel drive low are selected with the
appropriate drive modes , the four-wheel
drive system provides electronically locked
power to the front and rear wheels for use
in off-road or slippery conditions such as
deep snow, sand or mud. Selecting slow
climb also provides additional gearing for
increased torque multiplication for conditions
like deep sand, snow, steep slopes, or pulling heavy objects.
See Slow Climb (page 296).
Additionally, the system is capable of
recreational flat towing by putting the
transfer case into neutral (N).
See
Recreationally Towing Your Vehicle (page
397).
There is further information on driving in
unique driving conditions. See Driving Hints
(page
384).
FOUR-WHEEL DRIVE
PRECAUTIONS WARNING:
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.
223
2022 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202109, First-Printing Four-Wheel Drive
(If Equipped)

Note:
Your vehicle could have side steps
that can become damaged, due to reduced
ground clearance, when taking your vehicle
off-road. Remove side steps before driving
your vehicle off-road.
SELECTING A FOUR-WHEEL DRIVE
MODE
To select a specific four-wheel drive mode
please select one of the desired drive
modes. For additional information. See
Selecting a Drive Mode (page 294).
Note: When shifting to and from four-wheel
drive information display will show shifting
in progress message indicating that the
system is in the process of making a shift.
Note: Do not perform this operation if the
rear wheels are slipping or while applying
the accelerator pedal.
If the system detects a fault, a warning
message appears in the information display.
See
Four-Wheel Drive – Information
Messages (page 229). Note:
Do not use SLIPPERY, DEEP
CONDITIONS or SLOW CLIMB on dry, hard
surfaced roads. Doing so produces
excessive noise, increases tire wear and may
damage drive components. The 4X4 system
in these modes is only intended for
consistently slippery or loose surfaces.
Shifting to or from Slow Climb (4L)
To select or exit SLOW CLIMB (4L):
1. Bring your vehicle to a speed of
3.1 mph
(5 km/h) or less.
2. Place the transmission in neutral (N).
3. Select SLOW CLIMB on the drive mode control switch.
The information display will display a
message indicating a four-wheel drive shift
is in progress. If any of the above shift
conditions are not present, the shift will not
occur and the information display will display
information guiding the driver through the
proper shifting procedures. If there is a
transfer case tooth blockage a message will display in the information display. To alleviate
this condition, place the transmission in a
forward gear, move your vehicle forward
approximately
4.9 ft (1.5 m), and shift the
transmission back to neutral (N) to allow the
transfer case to complete the range shift.
Note: You could hear some noise as the
system shifts or engages which is normal. If
the system detects a fault, a warning
message appears in the information display.
See
Four-Wheel Drive – Information
Messages (page 229).
FOUR-WHEEL DRIVE MODES
TWO-WHEEL DRIVE HIGH
2H turns on when you select NORMAL or
CONSERVE. Two-wheel drive high is for
general on-road driving. Power is sent to the
rear wheels only.
Note: Two-wheel drive high can turn on or
off based on Drive Mode selection See Drive
Mode Control
(page 293).
225
2022 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202109, First-Printing Four-Wheel Drive
(If Equipped)

FOUR-WHEEL DRIVE AUTO
4A turns on when you select EXCITE,
NORMAL 4x4 AUTO or SLIPPERY.
Four-wheel drive auto provides electronically
controlled four-wheel drive power to both
the front and rear wheels, as required, for
increased traction in varying on-road
conditions. The four-wheel drive auto tuning
varies based on selected Drive Mode. See
Selecting a Drive Mode (page 294).
Note: Four-wheel drive auto can turn on or
off automatically based on Drive Mode
selection. See Selecting a Drive Mode (page
294
).
FOUR-WHEEL DRIVE HIGH
4H turns on when you select DEEP
CONDITIONS. Four-wheel drive high
provides electronically locked four-wheel
drive power to both the front and rear wheels
for use in off-road or winter conditions such
as deep snow, sand or mud. This mode is
not for use on dry pavement. Note:
Four-wheel drive high can turn on or
off automatically based on Drive Mode
selection. See Selecting a Drive Mode (page
294
).
FOUR-WHEEL DRIVE LOW
4L turns on when you select SLOW CLIMB.
Four-wheel drive low provides electronically
or mechanically locked four-wheel drive
power to both the front and rear wheels for
use on low traction surfaces, but does so
with additional gearing for increased torque
multiplication. This mode is only for off-road
conditions such as deep sand, steep slopes,
or pulling heavy objects.
Note: Four-wheel drive low can turn on or
off automatically based on drive mode
selection. See Selecting a Drive Mode (page
294
).
FOUR-WHEEL DRIVE INDICATORS
Two-wheel Drive High Momentarily illuminates when
two-wheel drive high is selected.Four-wheel Drive Auto Continuously illuminates when
four-wheel drive auto is selected.
Four-wheel Drive High Continuously illuminates when
four-wheel drive high is selected.
Four-wheel Drive Low
(If Equipped) Continuously illuminates when
four-wheel drive low is selected.
FOUR-WHEEL DRIVE DRIVING HINTS
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 can result
in loss of vehicle control. Apply smooth
pressure to the accelerator pedal or brake
226
2022 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202109, First-Printing Four-Wheel Drive
(If Equipped)E181778 E181781 E181779 E181780

Note:
Driving through deep water may
damage the transmission. If the front or rear
axle is submerged in water, the axle
lubricant and power transfer unit lubricant
should be checked and changed if
necessary.
DRIVING ON HILLY OR SLOPING
TERRAIN
Although natural obstacles may make it
necessary to travel diagonally up or down a
hill or steep incline, you should try to drive
straight up or straight down.
Note: Avoid turning on steep slopes or hills.
A danger lies in losing traction, slipping
sideways and possible vehicle roll over.
Whenever driving on a hill, determine
beforehand the route you can use. Do not
drive over the crest of a hill without seeing
what conditions are on the other side. Do
not drive in reverse over a hill without the
aid of an observer. When climbing a steep slope or hill, start in
a lower gear rather than downshifting to a
lower gear from a higher gear once the
ascent has started. This reduces strain on
the engine and the possibility of stalling.
If your vehicle stalls, do not try to turnaround
because this could cause vehicle roll over.
It is better to reverse back to a safe location.
Apply just enough power to the wheels to
climb the hill. Too much power can cause
the tires to slip, spin or lose traction, resulting
in loss of vehicle control.
Descend a hill in the same gear you would
use to climb up the hill to avoid excessive
brake application and brake overheating. Do
not descend in neutral. Disengage overdrive
or move the transmission selector lever to a
lower gear. When descending a steep hill,
avoid sudden hard braking as you could lose
control. The front wheels have to be turning
in order to steer your vehicle.
Note:
If your vehicle has anti-lock brakes,
apply the brakes steadily. Do not pump the
brakes. DRIVING ON SNOW AND ICE
Four-wheel drive vehicles have advantages
over two-wheel drive vehicles in snow and
ice but can skid like any other vehicle.
Should you start to slide while driving on
snowy or icy roads, turn the steering wheel
in the direction of the slide until you regain
control.
Avoid sudden applications of power and
quick changes of direction on snow and ice.
Apply the accelerator slowly and steadily
when starting from a full stop. Avoid sudden
braking. Although a four-wheel drive vehicle
can accelerate better than a two-wheel drive
vehicle in snow and ice, it cannot stop any
faster as braking occurs at all four wheels.
Do not become overconfident as to road
conditions.
Make sure you allow sufficient distance
between you and other vehicles for stopping.
Drive slower than usual and consider using
one of the lower gears. In emergency
stopping situations, apply the brake steadily.
Do not pump the brake pedal. See Anti-Lock
Braking System Limitations (page 233).
228
2022 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202109, First-Printing Four-Wheel Drive
(If Equipped)

Action
Message
Displays when you attempt to switch from four-wheel drive low modeand your vehicle's speed is greater than 3 mph (5 km/h).
To Exit 4x4 LOW Slow to 3 MPH
To Exit 4x4 LOW Slow to 5 km/h Displays when there is a transfer case gear tooth blockage while
shifting to or from four-wheel drive low mode or to the neutral state. Place the transmission in a forward gear, move your vehicle forward approximately
5 ft (1.5 m), and shift the transmission back to neutral
(N) to allow the transfer case to complete the range shift.
Shift Delayed Drive Forward
Displays when the four-wheel system detects elevated system
temperature and temporarily stops providing power to the front
wheels. The system automatically resumes normal function when the system temperature returns to normal.
4x4 Temporarily Disabled
Displays when the four-wheel drive system resumes normal function.
4x4 Restored
Displays when the four-wheel drive system detects driving condition
which temporarily require greater four-wheel drive performance. Thesystem automatically resumes normal function after the system no longer detects these driving conditions.
4X4 Temporarily Locked
Displays when the system requires an additional transmission shift toneutral (N) to complete a transfer case shift.
Shift to Neutral
230
2022 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202109, First-Printing Four-Wheel Drive
(If Equipped)

ELECTRONIC LIMITED-SLIP DIFFERENTIAL – TROUBLESHOOTING
ELECTRONIC LIMITED-SLIP DIFFERENTIAL – INFORMATION MESSAGES
Description and Action
Message
Displays when the system requires service. Have your vehicle checked as soon as possible.
Check Electronic Limited Slip Differential
Displays when the system requires service. Have your vehicle checked as soon as possible.
Electronic Limited Slip Differential Off See
Owner's Manual
Displays when the electronic limited slip differential system resumes no\
rmal function.
Electronic Limited Slip Differential Restored
to Normal
Displays if the electronic limited slip differential system temporarily \
turns off due to overheating
or an undersized spare tire. If you have an undersized spare tire installed, replace the spare tire\
with a full-sized tire as soon as possible. If not, stop the vehicle in a safe location and allow the system to cool.
Electronic Limited Slip Differential
Temporarily Disabled
Displays if the electronic limited slip differential has limited functio\
nality. This could be due to
an undersized spare tire or caused by the system overheating. If you ha\
ve an undersized spare
tire installed, replace the spare tire with a full-sized tire as soon as\
possible. If you do not have an undersized spare tire installed, the vehicle has reduced functionalit\
y. Have your vehicle checked as soon as possible.
Electronic Limited Slip Differential Reduced
Torque
Displays when you select a drive mode that does not allow the electronic\
limited slip differential
to turn on. This may also display when the electronic limited slip diffe\
rential has a fault and the vehicle requests the locking feature.
Electronic Limited Slip Differential Locking
Feature Not Available
232
2022 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202109, First-Printing Electronic Limited-Slip Differential (If Equipped)

BRAKE PRECAUTIONS
WARNING: Driving your vehicle with
the warning lamp on is dangerous. A
significant decrease in braking
performance may occur. It may take you
longer to stop your vehicle. Have your
vehicle checked as soon as possible.
Driving extended distances with the
parking brake engaged can cause brake
failure and the risk of personal injury.
Wet brakes result in reduced braking
efficiency. Gently press the brake pedal a
few times when leaving a car wash or driving
from standing water to dry the brakes.
Note: Depending on applicable laws and
regulations in the country for which your
vehicle was originally built, the stoplamps
could flash during heavy braking. Following
this the hazard warning flashers could also
turn on when your vehicle comes to a stop. ANTI-LOCK BRAKING SYSTEM
ANTI-LOCK BRAKING SYSTEM
LIMITATIONS
The anti-lock braking system does not
eliminate the risk of crash when:
•
You drive too closely to the vehicle in
front of you.
• Your vehicle is hydroplaning.
• You take corners too fast.
• The road surface is poor.
Note: If the system activates, the brake
pedal could pulse and travel further.
Maintain pressure on the brake pedal.
BRAKE OVER ACCELERATOR
In the event the accelerator pedal becomes
stuck or entrapped, apply steady and firm
pressure to the brake pedal to slow the
vehicle and reduce engine power. If you
experience this condition, apply the brakes
and bring your vehicle to a safe stop. Move the transmission to park (P), switch the
engine off and apply the parking brake.
Inspect the accelerator pedal for any
interference. If none are found and the
condition persists, have your vehicle towed
to the nearest authorized dealer.
LOCATING THE BRAKE FLUID
RESERVOIR
See
Under Hood Overview (page 415).
CHECKING THE BRAKE FLUID WARNING: Do not use any fluid other
than the recommended brake fluid as this
will reduce brake efficiency. Use of
incorrect fluid could result in the loss of
vehicle control, serious personal injury or
death.
233
2022 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202109, First-Printing Brakes

WARNING: Only use brake fluid from
a sealed container. Contamination with dirt,
water, petroleum products or other
materials may result in brake system
damage or failure. Failure to adhere to this
warning could result in the loss of vehicle
control, serious personal injury or death. WARNING:
Do not allow the fluid to
touch your skin or eyes. If this happens,
rinse the affected areas immediately with
plenty of water and contact your physician. WARNING:
The brake system could
be affected if the brake fluid level is below
the
MIN mark or above the MAX mark on
the brake fluid reservoir. 1. Park your vehicle on a level surface.
2. Look at the brake fluid reservoir to see
where the brake fluid level is relative to
the
MIN and the MAX marks on the
reservoir.
Note: To avoid fluid contamination, the
reservoir cap must remain in place and fully
tight, unless you are adding fluid. Only use fluid that meets our specifications.
See
Capacities and Specifications (page
469).
BRAKE FLUID SPECIFICATION
See
Brake Fluid Specification (page 476).
BRAKES – TROUBLESHOOTING
BRAKES – WARNING LAMPS If the ABS indicator illuminates
when you are driving, this indicates
a malfunction. Your vehicle
continues to have normal braking without
the anti-lock braking system function. See
an authorized dealer.
It also momentarily illuminates when you
switch the ignition on to confirm the lamp is
functional. If it does not illuminate when you
switch the ignition on, or begins to flash at
any time, have the system checked by an
authorized dealer.
234
2022 Navigator (TB9) Canada/United States of America, enUSA, Edition date: 202109, First-Printing BrakesE170684