Hi Tommy, welcome to the site,
Where exactly do you see it exiting the powertrain, more specifically than the front of the tranny ? Is it pouring out the front of pan, coming between the inspection cover and the case, running off the top of the
Transmission and down to near the front, down the right side and onto the ground or ? If your looking for a specific answer, your going to have provide some specifics. There are several ways for a
Transmission to "pour ATF" but your going to have to get under and have a look, some leaks can be repaired with the
Transmission in some not.
If its pouring out and the truck does not move, youre probably too low on fluid. Have you checked the fluid level, is it low or overfilled by 10 quarts or ???
While that probably does not matter much that your low on fluid (Im assuming that) if its pouring out, anything you add to get line pressure will just supply the pour out problem.
Whats the run up story to this event ? There has to be some kind of story how you got here, if you care to provide some more info, we might be able to help.