1999 FORD EXPEDITION traction control

CONTROL-TRAC AUTOMATIC FOUR-WHEEL DRIVE SYSTEM
(IF EQUIPPED)
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.
Positions of the Control-Trac system
The Control-Trac A4WD system
functions in three modes:
²A4WDposition delivers power to
the rear axle. If the rear wheels
lose traction, power will be
automatically delivered to the
front axle to maintain traction
throughout the slippery condition.
²4Hposition provides
mechanically locked four-wheel
drive power delivery to front and rear axles.
²4Lposition provides mechanically locked four-wheel drive when above
average power at reduced speeds is required.
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.
4HA4WD4L
Driving
115

Driving off-road with 4WD
Your vehicle is specially equipped for driving on sand, snow, mud and
rough terrain and has operating characteristics that are somewhat
different from conventional vehicles, both on and off the road.
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. For more
information on driving off-road, read the ªFour Wheelingº supplement in
your owner's portfolio.
If your vehicle gets stuck
If the vehicle is stuck in mud or snow it may be rocked out by shifting
from forward and reverse gears, stopping between shifts, in a steady
pattern. Press lightly on the accelerator in each gear.
Do not rock the vehicle for more than a few minutes. The
transmission and tires may be damaged or the engine can
overheat.
Do not spin the wheels at over 56 km/h (35 mph). The tires may
fail and injure a passenger or bystander.
Sand
When driving over sand, try to keep all four wheels on the most solid
area of the trail. Do not reduce the tire pressures but shift to a lower
gear and drive steadily through the terrain. Apply the accelerator slowly
and avoid spinning the wheels.
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 hubs (if possible) and proceed slowly. If the
ignition system gets wet, the vehicle may stall.
Driving
117

Once through water, always try the brakes. Wet brakes do not stop the
vehicle as effectively as dry brakes. Drying can be improved by moving
your vehicle slowly while applying light pressure on the brake pedal.
After driving through mud, clean off residue stuck to rotating driveshafts,
halfshafts and tires. Excess mud stuck on tires and rotating driveshafts
causes an imbalance that could damage drive components.
If the transmission, transfer case or front axle are submerged in water,
their fluids should be checked and changed, if necessary.
Water intrusion into the transmission may damage the
transmission.
If the rear axle is submerged in water, the rear axle lubricant should be
checked and changed, if necessary. The rear axle is filled with a
synthetic lubricant and does not normally require a lubricant change for
the life of the vehicle. Rear axle lubricant quantities should not need to
be checked unless a leak is suspected.
Driving on hilly or sloping terrain
When driving on a hill, avoid driving crosswise or turning on steep
slopes. You could lose traction and slip sideways. Drive straight up,
straight down or avoid the hill completely. Know the conditions on the
other side of a hill before driving over the crest.
When climbing a steep 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.
When descending a steep hill, avoid sudden braking. Shift to a lower gear
when added engine braking is desired.
When speed control is on and you are driving uphill, your vehicle speed
may drop considerably, especially if you are carrying a heavy load.
If vehicle speed drops more than 16 km/h (10 mph), the speed control
will cancel automatically. Resume speed with accelerator pedal.
If speed control cancels after climbing the hill, reset speed by pressing
and holding the SET ACCEL button (to resume speeds over 50 km/h
(30 mph).
Automatic transmission may shift frequently while driving up steep
grades. Eliminate frequent shifting by shifting out of
(Overdrive) into
D (Drive).
Driving
118

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 (1 1/2) times as well on the government course as a tire
graded 100. The relative performance of tires depends upon the actual
conditions of their use, however, and may depart significantly from the
norm due to variations in driving habits, service practices, and
differences in road characteristics and climate.
Traction AA A B C
The traction grades, from highest to lowest are AA, A, B, and C. Those
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.
The traction grade assigned to this tire is based on
straight-ahead braking traction tests, and does not include
acceleration, cornering, hydroplaning or peak traction characteristics.
Temperature A B C
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. Sustained high temperature can cause the material of the tire
to degenerate and reduce tire life, and excessive temperature can lead to
sudden tire failure. The grade C corresponds to a level of performance
which all passenger car tires must meet under the Federal Motor Vehicle
Safety Standard No. 109. Grades B and A represent higher levels of
performance on the laboratory test wheel than the minimum required by
law.
The temperature grade for this tire is established for a tire that
is properly inflated and not overloaded. Excessive speed,
underinflation, or excessive loading, either separately or in
combination, can cause heat buildup and possible tire failure.
Maintenance and care
167

Travel equipment
Console
Console armrest
Daytime running lights
Factory luggage rack
Factory luggage rack adaptors
Fog lights
Framed luggage covers
Heavy-duty battery
Neutral towing transfer case kit (Explorer 4.0L only)
Off road lights
Pickup box rails
Removable luggage rack
Removable luggage rack adapters
Retractable bed hooks and loops
Running boards
Snow traction cables
Soft luggage cover
Speed control
Towing mirrors
Trailer hitch
Trailer hitch bars and balls
Trailer hitch wiring adaptor
Protection and appearance equipment
Air bag anti-theft locks
Bed mat/bedliner tailgate covers
Bed mats
Bedliners
Car/truck covers
Cargo liners, interior
Customer assistance
208

fuel reset ...................................11
low fuel ........................................6
low washer fluid .......................10
safety belt ...................................8
service engine soon .................6,7
turn signal indicator ...................8
Locks
childproof ..................................61
doors ..........................................61
Lumbar support, seats ..........74,75
Message center ......................14,57
english/metric button ...............15
menu button .............................15
Mirrors
fold away ...................................63
heated ...................................62,63
side view mirrors (power) .......62
Moon roof ....................................57
Motorcraft parts ........................174
Octane rating ............................172
Overdrive .....................................55
Parking brake ............................107
Parts (see Motorcraft parts) ....190
Power adjustable foot pedals .....18
Power distribution box (see
Fuses) ........................................133
Power door locks ...................70,71
Power steering ...................108,109
fluid, checking
and adding .......................158,159
Radio .............................20,21,22,23
Relays .................................129,136
Remote entry system ............67,68
illuminated entry ......................70
locking/unlocking doors ...........68
replacement/additional
transmitters ...............................70
replacing the batteries .............69
Roof rack ...................................127
Safety Compliance
Certification Label ....................198
Safety defects, reporting ..........211Safety restraints
cleaning the safety belts ...88,189
extension assembly ..................87
for children ...............................93
lap belt ......................................86
warning light and chime ..........88
Seat belts (see Safety
restraints) ................83,84,85,86,87
Seats ............................................74
child safety seats ......................94
cleaning ...................................189
Servicing your vehicle ..............148
Snowplowing .................................3
Special notice ................................3
ambulance conversions ..............3
utility-type vehicles ....................3
Specification chart, lubricants .194
Speed control ..............................49
Starting your vehicle .........100,102
jump starting ............142,143,145
preparing to start your
vehicle .......................................65
Steering wheel
tilting .........................................53
Tires .............................166,167,168
changing ...........................137,138
checking the pressure ............168
replacing ..................................169
rotating ....................................168
snow tires and chains ............169
tire grades ...............................167
treadwear ................................167
Towing ....122,123,124,125,126,127
wrecker ....................................147
Traction-lok rear axle ...............110
Transmission .............................111
fluid, checking and adding
(automatic) ...............159,160,161
Vehicle dimensions ...................196
Vehicle Identification Number
(VIN) ..........................................198
Vehicle loading ..........................119
Index
214