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Traction AA A B C
The traction grades, from highest to lowest are AA, A, B, and C. The grades represent the tire’s ability to stop on wet pavement as measured under controlled conditions on specified government tes ...

Overview
The Lincoln Navigator serves as Lincoln's full-sized luxury SUV. The Navigator shares the same platform with the lesser Ford Expedition full-size SUV. Introduced in 1998, the Navigator has proven ...

Motorcraft part numbers
1For spark plug replacement, see your authorized dealer. Refer to scheduled maintenance information for the appropriate intervals for changing the spark plugs. Replace the spark plugs with ones ...