Ford's Super Duty pickup gets modified interior and exterior styling, but more important is what's under the hood: A new Ford-designed 6.7 liter diesel V8 (replacing the former Navistar-sourced engine), a new 6.2 liter twin-plug gasoline V8, and a new six-speed automatic transmission. Ford says ride and handling are also improved, and that the new diesel will be the quietest on the market.