10 Models That Dropped the Manual Gearbox Published on October 17, 2019 in Top 10 by Frédéric Mercier Photo: Ford Ford Mustang GT500With a fearsome V8 engine producing 760 horsepower, the new 2020 Ford Mustang Shelby GT500 promises spectacular performance. However, unlike its predecessors, you can only order one with an autobox. Blasphemy!