The transmission shaft is composed of a shaft tube, a telescopic sleeve and a universal joint.
Driveshafts that attach or assemble accessories, but also move or rotate round object parts, are generally made of alloy steel tubes that are light and torsional. For a front-engine rear-wheel-drive vehicle, it is the shaft that transmits the rotation of the transmission to the final drive. It can be connected several times by universal joints. It is a rotating body with high speed and little support, so its dynamic balance is crucial. General driveshafts must perform dynamic balancing tests before leaving the factory and adjust them on the balancing machine
