Abstract: An improved counterbalanced tailgate for dump boxes including a continuous pivot shaft which extends across the entire width of the gate bottom and is rotatably contained within the gate and extends through the sides thereof. One or more heavy duty helical springs are coaxially mounted about the shaft with one end of each spring being attached to the shaft, and the other either affixed to or bearing against a portion of the tailgate so that the springs resiliently resist rotation of the shaft about its longitudinal axis. A bayonette type latching arm is rigidly attached to each protruding shaft end, and an opening is provided in the lower side wall of the dump body on each side to receive the latching arms.