Transmission leak woes!

Let it dry and silicone it to make sure if it is the tube or not.Also the pan may be warped and the more you tighten the bolts the worst it leaks.Next time the pan is off look it over real good and make sure the bolt holes are not bent upward,which causes the pan to push thru the gasket and bottom out before the spaces between the bolt holes can seal off.As for a 904 tube and stick working on a 727 i have no idea.