gear secured to the case at the attachment bole holes on the flange 11 drives the case 10 in rotation about axis 12 from an output of a transmission or transfer case the case 10 provides an internal chamber 14 which contains bevel pinions 16 a right side gear 18 meshing with the pinions and driveably connected to a right output shaft 20 which extends from the case 10 to a driven wheel of a motor vehicle and a left side gear 22 meshing with the pinions and driveably connected to a left output shaft not shown which extends from the case to a driven wheel at the left side the pinions 16 are each secured by pins 24 to the rotating case 10 such that the pinions 16 rotate about the axis of pins 24 perpendicular to axis 12 and the pinions and pins 24 rotate about axis 12 also located in the case 10 is a locking ring 26 secured to the case such that it rotates about axis 12 and moves axially relative to the case along the axis the ring 26 is formed with three posts 28 each post extending axially through a hole in web 30 which is formed in the case.