The F-250 is a heavy duty truck with a 3/4 ton capacity as opposed to the 1/2 ton of the F-150. The Super Duty won't be redesigned until after 2004. The ride is stiff and bouncy. Ford's new 6.0-liter diesel packs some real punch and is fairly quiet and free of vibration. Stepping into the cabin is more difficult because of the high floor.