This high capacity transmission pan is the perfect bonus to your built or stock Allison 1000 automatic. The pan is constructed of lightweight, cast-aluminum for efficient heat dissipation, durability, and holds approximately 3 more quarts of fluid than a stock pan. The patented, sloped floor design results in 100% drainage, while the magnetic drain plug catches and eliminates debris from circulating throughout the transmission. The copper sealing ring provides a leak-free seal. A billet-aluminum filter lock is included, as well as a new transmission filter. The drain plug also uses a 1" socket for easy removal & is designed not to strip. The Allison 1000 transmission pan also comes with pan bolts and washers.