Convertible vehicle topwell assembly

A topwell assembly comprising:

• a rigid, unitary molded plastic shell for attachment to vehicle structure to support a convertible top having an integral support surface, side wall surfaces projecting laterally from said support surface, a front wall surface depending downwardly from said support surface and having a terminal end adjacent a floor of vehicle structure, and a rear wall surface projecting from said support surface;
• said support surface having three longitudinally extending and laterally spaced channels formed therein to provide a dual function to increase rigidity and strength of said support surface and to drain fluid from said support surface, and a laterally extending channel between one end of said longitudinally extending channels and said front wall surface, and at least one aperture in said laterally extending channel for draining water collected in said longitudinally extending channels and said laterally extending channel;
• separate side portions at each side of said shell between vehicle structure and said side wall surfaces and having a shelf portion overlapping a flange on said side wall surfaces of said shell such that said side portions may sealingly engage said shell;
• a grommet member sealingly disposed within said aperture;
• a drainage tube having an end thereof attached to said grommet;
• and
• a silencing material attached to an outer surface of said shell.