Your firist mistake is to use cork for the gasket. Use Neoprene composition. Your second mistake is to believe the directions and not use sealant. Use a thin layer of black RTV on the pan side and a thin layer on the gasket side. Let it get tacky before adding the gasket. Make sure the holes are lined up really well by inserting a few bolts in the holes of the pan while the pan is still off the car.
Make sure you use Tpye F fluid and nothing else. Torqe the pan bolts to 12 ft. lbs. Start with the middle bolts and work toward the ends. Start with just snug, then repeat with 6 lbs., then finish with 12 lbs. If your idea was to save money by making your own cork gasket, you will be sorry because that pan will leak like a sieve. Do it right the first time.
