How Does a Driveshaft Work?


A driveshaft, also known as a propeller shaft, plays a crucial role in transmitting power from the engine to the wheels of a vehicle. It is an essential component of rear-wheel-drive, four-wheel-drive, and all-wheel-drive vehicles. The driveshaft’s primary function is to transfer torque from the transmission to the differential, which then distributes the power to the wheels.

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The driveshaft consists of a long, cylindrical tube usually made of steel or aluminum. It is designed to be both strong and lightweight to minimize energy loss and ensure smooth operation. Universal joints, commonly referred to as U-joints, are strategically placed at each end of the driveshaft to allow for movement and flexibility. These joints are crucial in accommodating the changing angles between the transmission, differential, and axles as the vehicle moves and the suspension flexes.

When the engine generates power, it transfers rotational force to the transmission. The driveshaft, connected to the output shaft of the transmission through the U-joint, receives this rotational energy. As the driveshaft rotates, the U-joints allow it to move and adapt to varying road conditions and suspension movements while maintaining a consistent power delivery.

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