transmission pan sealing

You should never have to use sealant. Almost a sure bet it ain't the gasket that is leaking or even weeping. Definitely isn't from the pan bolts. Don't let frustration get in the way of a calm process of elimination approach. There are a few areas of the trans where weeping or leaking can occur. The obvious and already mentioned dipstick tube oring and shift shaft seals. Front pump seal. Also, the band adjusting nut/bolt on the left side can leak (mine does I've discovered and it collects on the excellent non leaking Moroso pan gasket I'm using) Leaks can also eminate from the rear band lever pivot pin. The extension housing mating surface and the speedometer pinion. Hit all the accessible areas with some brake cleaner and monitor the areas. Angle of the trans can cause drips to show up far away from the actual leak. Pretty sure you'll find the source.