Abstract: An inclination maintaining system for a discharge chute of a ready-mix concrete truck or the like including a body on which the chute is pivotally mounted for movement about an axis extending horizontally and transversely of the chute, the system having sensors mounted on the chute for sensing inclination thereof relative to the horizontal about the axis, an extensible and contractible member interconnecting the body and the chute in attitude controlling relation to the chute, and control elements responsive to the sensors for extending and contracting the member so as to maintain the chute at the inclination.