'64 Barracuda trans/shift lines question?

So now I am confused. I have gotten different answers from people in this forum as well. Do the shift/park linkages really carry fluid? If they do, then the only course of action is to replace them.

I am pretty sure the speedo cable has some issues as well because the previous owner gunked a bunch of black silicon where the cable goes into the trans. But when I cleaned the line off it didn't look like it was seeping from there. Is it possible that if the cable was lower than the point where it went in the trans, that gravity would have pulled to fluid to the cracked spot in the line, through the cable itself?