2018-Navigator-Owners-Manual

Four-Wheel Drive (If Equipped)

Operating 4WD Vehicles With Spare or Mismatched Tires On four-wheel drive vehicles, the size of the spare tire can affect the 4X4 system. If there is a significant difference between the size of the spare tire and the remaining tires, you may have limited four-wheel drive functionality. When driving with the full-size dissimilar spare wheel and tire assembly, it is recommended that you do not: • Exceed 50 mph (80 km/h) with a 4WD mode turned on. • Turn on a 4WD mode unless the vehicle is stationary. • Use a 4WD mode on dry pavement. Use of a dissimilar spare wheel and tire assembly may lead to impairment of the following: • Comfort and noise. • Winter weather driving capability. • Wet driving capability. • Four-wheel drive capability.

2H (4X2) 2H turns on when you select NORMAL or CONSERVE . Power is delivered to the rear wheels only. This mode is appropriate for normal on-road driving on dry pavement and provides the best fuel economy. 4A (4X4 Auto) 4A turns on when you select EXCITE , NORMAL 4x4 AUTO or SLIPPERY . It provides electronically controlled four-wheel drive with power delivered to all four wheels, as required, for increased traction. 4A is calibrated in conjunction with Drive Mode. 4A in EXCITE is less aggressively tuned and is appropriate for dry road surfaces. 4A in NORMAL 4x4 AUTO is appropriate for all on-road driving conditions, such as dry road surfaces, wet pavement, light snow or gravel. 4A in SLIPPERY is more aggressively tuned and is appropriate for slippery surfaces, such as light snow or gravel.

4H (4X4 High) 4H turns on when you select DEEP CONDITIONS . It 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. 4L (4X4 Low) 4L turns on when you select SLOW CLIMB . It provides electronically 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. Intended only for off-road applications such as deep sand, steep grades or pulling heavy objects. 4L does not engage when your vehicle is moving above 3 mph (5 km/h); this is normal and should be no reason for concern.

219

Navigator (TB9) Canada/United States of America, enUSA, Edition date: 201708, First Printing