One of the most fulfilling parts of driving a car is shifting gears. Enthusiasts like us yearn for open, twisty roads, going through the gears and surfing a wave of torque. Yet, most of us are stuck ...

At first glance, an 18-speed transmission sounds like overkill. After all, most cars get by with five or six gears. But semi trucks are built for an entirely different purpose, and that is moving ...