Power is supplied to all four wheels through a transfer case. On 4WD
vehicles, the transfer case allows you to select 4WD 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 the
Maintenance
chapter. You should become thoroughly
familiar with this information before you operate your vehicle.
4WD (when you select a 4WD mode) 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.
Basic Operating Principles In Special Conditions
•
Do not use 4H or 4L on dry, hard surfaced roads. Doing so will
produce excessive noise, increase tire wear and may damage drive
components. 4H or 4L modes are only intended for consistently
slippery or loose surfaces.
•
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.
Four-Wheel Drive (If Equipped)
207
2015 Expedition
(exd)
Owners Guide gf, 1st Printing, July 2014
USA
(fus)
