Had the old three speed transmission rebuilt just a bit over 2.5 years ago, and just recently the pan is leaking lots. The trans shop used a cork gasket on the pan. I guess I could re-torque the pan bolts, but not sure that would help with the leak. I plan on dropping the pan, and installing a new filter and gasket. I have three choices for pan gasket material. Cork, ACDelco Professional Farpak, and ATP fibrous that seals with first heat cycle. Definitely not going with cork. No idea what Farpak is. The ATP fibrous sounds interesting, and I don't need to use a sealer with it. ATP is reasonably priced, and the Farpak stuff costs about three times as much. Has anybody used the ATP kits with the fibrous heat cycle sealing gaskets?