Abstract: A drive unit for selectively effecting driving or free-wheeling condition of propeller shafting in a motor vehicle comprising a drive unit for attachment to and/or attached to spaced-apart portions of an automobile propeller shaft for selectively establishing drive relationship or free-wheeling relationship between the propeller shaft portions as desired including:(a) an elongate first member for extending for at least the full distance between adjacent ends of portions of a propeller shaft;(b) a second member with first bearing members in supporting relationship between the second member and one part of the first member;(c) a third member with additional bearing members in supporting relationship between the third member and a second part of the first member;(d) first coupling structure for selectively locking or unlocking the first member along with the second member to or from one portion of a propeller shaft;(e) second coupling structure for selectively locking or unlocking the first member along with the

Abstract: A motor vehicle towing trailer comprising a main carriage frame having a leading end provided with a hitching member, a trailing end provided with ground engaging wheels on opposite sides thereof, and a support platform on which the front or rear wheels of a motor vehicle to be towed may be supported, the support platform comprising a leading support rod and a trailing support rod extending generally transversely of the carriage frame, and a swivel plate extending beneath the support rods, the support rods being secured to the support plate in the assembled condition thereof with the support plate including structure for selectively securing one of the support rods in a series of different positions from front to rear with respect to the support platform.