Monster Jam trucks rely on chunky Rockwell F106 axles to transfer the engine’s grunt to the ground. A locking rear-differential and an electric-assist rear-steering system allow the trucks to easily pull off stunts such as wheelies and donuts. Meanwhile, a two-speed automatic transmission serves as the middleman between the big bent-eight and the differentials. Stopping comes courtesy of a disc brake mounted to the front of each axle.