6500 lb Deluxe Gear Plate Assembly The 6500 lb Deluxe Gear Plate Assembly. This gear plate assembly features a solid aluminum worm housing, extended support blocks, easy to reach grease fittings, and composite bronze back plate bearing. No steel on steel moving parts. The Plate Assembly has a single worm with a hardened steel worm and solid bronze 96 tooth worm gear. Rated for 6500 lb capacity.