How is everyone sealing the transmission pan to their ST300 auto transmission. My '66 gets driven very little (once every couple months), and in the 25 years I have owned it, I have never been able to get the pan gasket on the trans to no leak when sitting around. I have one of the composit rubber gaskets on it and that has worked best (compared to the cork gaskets). Has anyone ever tried putting the pan on with a thick bead of silicone RTV with no gasket installed? I know that is how alot of modern engines and transmissions seal their joints now and it works very well.