With truck-tough underpinnings the Navigator pounds broken pavement into submission, traverses eroded fire roads that would leave the typical crossover SUV high-centered, dispatches light mud and snow, and tackles corners with a flat attitude at normal driving speeds. Add velocity on sweeping corners and the heavy Lincoln starts to bob and weave, the numb steering providing zero detail about what's happening at the road surface. Pitch it into a hairpin and it plows, howls, and rolls. Ride quality is what you might expect, as long as you expect a pickup truck with a loaded bed. The brakes are easy to modulate after the first half-inch of travel, during which time nothing happens except the injection of adrenalin into your system.