Torque transmission system formed by the combination of a Freewheel and elastic coupling. Its function is to unite shaft ends and allow the transmission of torque in the Freewheel indexing direction and free rotation when the force transmission request belongs to the coupling side. In this second case, the system coupled to Roda Livre remains static. However, its exclusive indexing system, formed by a floating lock core, allows it to work in applications with high torque and speed requests.