Abstract: Device for detecting clearance in the wheel suspension of a vehicle, comprising a frame, two wheel support plates mounted on said frame for rotation and movable during operation substantially in a horizontal plane, and drive means for moving said wheel support plates in opposing directions relative to one another over limited distances. The wheel plates are each mounted for rotation about a vertical axis and for lengthwise movement transversely of an imaginary connecting line between the two plates and that the drive means can cause these turning and lengthwise movements to occur independently of one another and either separately or simultaneously.