Complex sentence: The front suspension on 4x2 models is independent twin I-beam with coil springs on the F-250 and F-350 pickups, while a solid axle is used on F-350, F-450 and F-550 cab chassis trucks.
Split into simpler sentences: The front suspension on 4x2 models is independent twin I-beam with coil springs on the F-250 and F-350 pickups. While a solid axle is used on F-350, F-450 and F-550 cab chassis trucks.