Required to properly mount the tray assembly, adjustable mounting position allows the tray to work at its maximum potential by being as close as possible to the rotating assembly (min.100") and to avoid any unnecessary interference with the oil pan. Install the 7/16" nuts torqued to 65 ft./lbs.or 1/2" to 85 ft/lbs using oil, and the 3/8" nuts torqued to 35 ft./lbs.