Abstract: In a powertrain including a multiple-speed axle assembly housed in an axle case, the mullet-speed axle includes an input shaft, an output shaft and a gearset having first and second members. The first and second members are adapted to produce a direct drive connection between the input shaft and output shaft when said members are connected mutually and to underdrive the output shaft in relation to the input shaft when said members are mutually disconnected and the first member is connected with the case. A coupling is provided for mutually connecting and disconnecting the first and second members and for connecting the first member with the case. A selector actuates the coupling to mutually connect and disconnect the members.