A limited slip differential for a vehicle, comprising: a differential assembly having a differential mechanism disposed in a differential case and two opposite output shafts outwardly extending from the differential case ; a torque coupling unit selectively restricting rotation between one of the output shafts and the differential case , the torque coupling unit comprising: a friction clutch assembly disposed about one of the output shafts , the friction clutch assembly comprising a first portion drivingly engaged with one of the output shafts and a second portion drivingly engaged with the differential case , a ball and ramp assembly disposed adjacent the friction clutch assembly selectively frictionally loading the friction clutch assembly , the ball and ramp assembly comprising at least a pressure plate and an actuating ring , the actuating ring rotatable with respect to the pressure plate , and an actuator in driving engagement with one of the pressure plate and the actuating ring of the ball and ramp assembly to selectively cause a rotation therebetween; and a differential housing rotatably supporting the differential assembly and the friction clutch assembly therewithin, the differential housing including a radially inwardly extending portion about one of the output shafts , wherein the radially inwardly extending portion of the differential housing receives a ball and ramp assembly support bearing and an output shaft support bearing , wherein the ball and ramp assembly support bearing supports rotation of the actuating ring of the ball and ramp assembly within the differential housing . a differential assembly having a differential mechanism disposed in a differential case and two opposite output shafts outwardly extending from the differential case ; a torque coupling unit selectively restricting rotation between one of the output shafts and the differential case , the torque coupling unit comprising: a friction clutch assembly disposed about one of the output shafts , the friction clutch assembly comprising a first portion drivingly engaged with one of the output shafts and a second portion drivingly engaged with the differential case , a ball and ramp assembly disposed adjacent the friction clutch assembly selectively frictionally loading the friction clutch assembly , the ball and ramp assembly comprising at least a pressure plate and an actuating ring , the actuating ring rotatable with respect to the pressure plate , and an actuator in driving engagement with one of the pressure plate and the actuating ring of the ball and ramp assembly to selectively cause a rotation therebetween; and a friction clutch assembly disposed about one of the output shafts , the friction clutch assembly comprising a first portion drivingly engaged with one of the output shafts and a second portion drivingly engaged with the differential case , a ball and ramp assembly disposed adjacent the friction clutch assembly selectively frictionally loading the friction clutch assembly , the ball and ramp assembly comprising at least a pressure plate and an actuating ring , the actuating ring rotatable with respect to the pressure plate , and an actuator in driving engagement with one of the pressure plate and the actuating ring of the ball and ramp assembly to selectively cause a rotation therebetween; and a differential housing rotatably supporting the differential assembly and the friction clutch assembly therewithin, the differential housing including a radially inwardly extending portion about one of the output shafts , wherein the radially inwardly extending portion of the differential housing receives a ball and ramp assembly support bearing and an output shaft support bearing , wherein the ball and ramp assembly support bearing supports rotation of the actuating ring of the ball and ramp assembly within the differential housing . <EOS>