TH350 Cast Aluminum Deep Pan One of the best investments you can make to assure longevity of your automatic transmission is a cast aluminum deep pan. Designed with cooling fins to dissipate heat faster, these pans also provide additional strength and rigidity to the transmission case. No modifications are necessary to the stock dipstick and the pan includes magnetic drain plug, fluid pickup extension, filter, pan gasket and new rail bolts and washers. Holds 2 extra quarts