Our new Heavy Duty Deep Trans pans are made from super thick cast aluminum. These feature a flange that is nearly a HALF INCH thick, which helps to provide structural support to the trans case, as well as virtually eliminate any oil leaks. And the 3" depth holds an extra 2 quarts of fluid which helps with cooling as well. And the drain plug makes trans fluid changes super easy. Don't forget to also use our 200-1185 filter extention to drop the filter down to the bottom of the pan.