Abstract: A hydraulically actuated winch assembly having a dual planetary gear system for driving a common ring gear from a power input shaft. Power from the shaft is divided through the two planetary gear systems for driving the common ring gear which is attached to the load member, such as a winch drum. A brake assembly can be assembled as a unit and then inserted into the winch assembly and is axially fixed in position by a retainer plate that is held on the housing of the winch assembly by means of a snap ring. The brake assembly is axially inserted into the housing and against the snap ring and bolt means then are secured between the retainer plate and brake assembly so as to fix the assembly in position within the housing. The brake assembly; includes an axially extending piston rod forming a part of a hydraulic actuator which actuates the brake assembly and the power input shaft for the planetary gear system is piloted in the end of the piston rod.

Abstract: A transmission brake with a lubricating and cooling means whereby a portion of the actuating fluid is used to cool the transmission brake and lubricate the brake disks while the transmission brake is operated.

Abstract: A pivotal support for a vehicle drive line of an articulated vehicle using gimbal rings supporting two universal joints and equally dividing angularity of these two joints and controlling the angularity of a third universal joint of the drive line.

Abstract: A four pinion differential with a one-piece housing and a differential lock to lock the differential for synchronous rotation of the side gears or differential rotation of the side gears. The pinion gears of the differential are mounted on a cross shaft and a pair of stub shafts which are retained in nonrotating position by a locking bolt extending through the stub shafts to lock the stub shafts in recesses on the cross shaft.