What does driveshaft mean?
A driveshaft is a long, rotating metal shaft that carries mechanical power from a vehicle's engine and transmission to the wheels. Found chiefly in rear-wheel-drive and four-wheel-drive vehicles, it spins at high speed beneath the body of the car, connected by joints that allow it to flex as the suspension moves. Because it endures constant rotation and heavy torque, a damaged driveshaft produces telltale symptoms such as vibration, clunking, or shuddering under acceleration, making it familiar to drivers and mechanics alike. The word belongs firmly to the vocabulary of motoring and engineering rather than general conversation, but it appears regularly in repair manuals, mechanic's reports, and car journalism. British speakers often prefer the older terms propeller shaft or propshaft, while American English uses driveshaft almost exclusively. As a closed compound combining drive with shaft, the word describes exactly what it does: a shaft that drives.
nounA rotating shaft that transmits power from a vehicle's engine or transmission to its wheels or axles, especially in rear-wheel-drive and four-wheel-drive vehicles.
- A rotating shaft in a motor vehicle or machine that transmits mechanical power from the engine or transmission to the axle, differential, or driven component.
- By extension, any similar rotating shaft used to transmit torque between parts of a machine.
"The mechanic discovered a cracked driveshaft after the car began shuddering at highway speeds."
"The mechanic discovered a worn universal joint on the rear driveshaft while inspecting the truck."
"In older front-engine sports cars, a long driveshaft runs beneath the cabin floor from the gearbox to the rear differential."
Regular plural, used mainly in automotive and engineering contexts when discussing multiple vehicles or designs.
"Both pickup trucks were recalled because their driveshafts could corrode and fail."
Without a driveshaft, your engine's power would go nowhere: it's the spinning steel spine that carries torque from the gearbox all the way back to the wheels.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of driveshaft
Driveshaft is a compound formed from the verb "drive" — from Old English drīfan, meaning to push or propel — combined with "shaft," an Old English word for a long rod or stem. The term arose during the late nineteenth century alongside the development of automobiles and powered machinery, when engineers needed a name for the rotating rod that transmitted power from an engine to the driven wheels or axles. Its British counterpart, "propeller shaft" (often shortened to "propshaft"), was borrowed by analogy from marine engineering, where a shaft turns a ship's propeller. Related compounds sharing the same root include drivetrain, drive belt, and driving wheel.
How driveshaft is actually used
Primarily an automotive and mechanical engineering term; everyday use is almost always tied to vehicles. In British English the terms "propeller shaft" and "propshaft" are more traditional for cars, while American English favors "driveshaft." It is typically written as one closed compound word.
Easily confused with driveshaft
The drivetrain is the entire system of components that delivers power to the wheels — including the engine, gearbox, differential, and axles — whereas the driveshaft is just one rotating shaft within that system.