The frame of the 2007 Lincoln Navigator is a tube-through-tube design that Lincoln’s engineers say is one of the stiffest frames in the industry, resulting in improved handling and fewer squeaks and rattles. Chassis modifications and a lower center of gravity along with the fully-independent five-link rear suspension smooth the ride, and an optional load leveling suspension keeps the ride quality consistent over uneven terrain and in corners. The Navigator’s suspension tuning definitely skews toward the luxury end of the spectrum, and while we prefer a firmer chassis we admit that the Gator never felt “floaty,” commendable considering the size and weight of this SUV. Larger and thicker brakes provide well-modulated stopping power.