2008 Ford Expedition Owner Guide 2nd Printing (Spanish) - Page 737

Driving The message center will display "4X4 SHIFT IN PROGRESS" during the shift. The RTT location in the message center will then display the system mode selected. If any of the above shift conditions are not met, the shift will not occur and the RTT location in the message center will display the appropriate information. 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 AdvanceTrac௡ with RSC stability enhancement system can be turned off manually by pressing the AdvanceTrac௡ with RSC button (refer to AdvanceTrac௡ with Roll Stability Control (RSC) Stability Enhancement System in this chapter) while operating in 2H, 4A or 4H 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. 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 4H (4x4) or 4L (4x4 LOW) on dry, hard surfaced roads. This may damage the driveline and axles. 297 2008 Expedition (exd) Owners Guide (post-2002-fmt) USA (fus)