Abstract: A three-dimensional four bar linkage mechanism is described which provides in and out movement of the rear corners of a convertible top as the top is being lowered or extended which allows the storage space for the retracted top to be smaller in width than the width of the foot print of the top when extended. A drag link which is hinged at one end to one bar and connected by a ball joint to a second bar which in turn is obliquely hinged to a third bar provides the three-dimensional action.