Nine-speed gearboxes may be commonplace now, but the world's first example didn't have such an easy birth when it was launched. And it wasn't that long ago.

Jeep will recall nearly 83,000 Cherokee SUVs for a troublesome transmission that has plagued the vehicle since its debut. Last month, Jeep said it would recall 2014 Cherokees equipped with a 3.2-liter ...