2004 Ford F-150 Super cab in excellent condition! FX4 models are equipped with special off-road suspension, limited-slip differential and a 2-speed transfer case. They have special tires designed to grip all sorts of road conditions and benefit from the new F-150 frame, which is said to be nine times stiffer torsionally than its predecessor. Along with their new ultra-stiff boxed frames, the ride of 2004 F-150 models is even more stable. This is primarily due to new outboard rear shock absorber