Had tranny built as I couldn't get stock to hold up under engine I built. The Tranny pan has leaked since installed, Comes thru gasket in front, Put 2 new gaskets on it, 1 new pan. Still leaks. Have an xtra thick gasket now. I know your not supposed to use sealer on the tranny, but does it really hurt anything? I think there may be a low spot ir even small crack in tranny yhere.