If you're like a lot of the Jalopnik staff, you've probably got a car old enough to have a dedicated overdrive button on or ...

If you remember driving an older automatic car or currently have one, you might have noticed the O/D Off switch that usually sits below the button you press to shift the vehicle. Or you might have ...

In ye olden days of auto manufacturing, three-speed automatics were fairly common. Top gear was usually direct drive, meaning the transmission's input shaft (which is directly connected to the engine) ...