CAMBIO DI VELOCITA' CON DUE MECCANISMI DI RINVIO PER AUTOVEICOLI

摘要

A change-speed gearbox having two countershaft transmission each connected by a frictional driving clutch to an input shaft and having a single common countershaft. Two gear wheel stages of the countershaft transmissions can be optionally connected into the driving connection between the input and output shafts by a change-speed clutch. One of the two gear wheel stages of one countershaft transmission is allocated to the reverse gear, and one of the two gear wheel stages of the other countershaft transmission is used both in reverse gear and in second gear.