2008 Lincoln Navigator Owner Guide 1st Printing - Page 256

Driving • If the image is not clear, then check if there is anything covering the lens such as dirt, mud, ice, snow, etc. If the image is still not clear after cleaning, have your system inspected by your authorized dealer. CONTROL TRAC FOUR-WHEEL DRIVE (4X4) OPERATION (IF EQUIPPED) For important information regarding safe operation of this type of vehicle, see Preparing to drive your vehicle in this chapter. Do not use 4X4 mode on dry, hard surfaced roads. Doing so will produce excessive noise, increase tire wear and may damage drive components. 4X4 mode is only intended for consistently slippery or loose surfaces. Use of 4X4 mode on these surfaces may produce some noise (such as occasional clunks) but will not damage drive components. 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. System indicator messages The Control Trac system indicator messages display in the reconfigurable telltale (RTT) location in the message center only under the following conditions. If these messages display when driving in 4X2, contact your authorized dealer as soon as possible. Refer to Warning lights and chimes in the Instrument Cluster chapter. • 4X4 AUTO - displays when 4X4 AUTO is selected. • 4X4 - displays when 4X4 is selected. Positions of the Control Trac system The Control Trac system functions in three modes: • 4X2 (2WD) delivers power to 4X4 4X2 4X4 the rear wheels only. This is AUTO appropriate for normal on-road driving on dry pavement. • 4X4 AUTO provides electronic control four-wheel drive with power delivered to all four wheels, as required, for increased traction. The RTT location in the message center will display "4X4 AUTO" 256 2008 Navigator (nav) Owners Guide (post-2002-fmt) USA (fus)