Automatic transmissions are a wonder of planetary gears, torque converters, and fluid. Here's how it all works to get you the speed you need when you need it.

It’s one of those statistics that you read and reread but still can’t quite get your head around. Chevrolet sold 1,074,925 Impalas and Impala Super Sports in 1965—more than any other U.S. model either ...