Abstract: A ball hitch system for towing gooseneck trailers. A ball and a shank include a longitudinal bore with a rod being vertically moveable in the bore. The lower end of the shank includes one or more pivotable cams. When the rod is in its lower position, the rod causes the cams to pivot outwardly beyond the side edges of the shank. The extending cams prevent the shank from being lifted out of a tubular sleeve which is secured to the frame of the truck being used for towing the trailer. When the gooseneck tongue is disconnected from the ball, the rod is able to be moved to a raised position, thereby enabling the cams to pivot to a retracted position. Then the ball and shank can be lifted out of the tubular sleeve for separation from the truck frame.