Arguably the biggest rivalry in the American auto industry will sign a truce in 2017. Having fought for supremacy on the muscle car market since 1966, the Ford Mustang and the Chevrolet Camaro will share a transmission starting next year. The unit in question is a ten-speed automatic gearbox co-developed by General Motors and Ford Motor Company. The cooperation began back in 2013, when the companies jointly announced that they would team up to develop two new automatic transmissions - a nine-speed for front-wheel-drive vehicles, and a 10-speed for RWD cars.