Have you actually seen where the leak is coming from? I would think if its just a pan seal, that you would only have to remove the pan for repair. Its just a thought, to save you some time, and I am by no means a transmission expert. Please someone correct me if I am wrong.
Most likely it's the front pump seal. Mine just blew and it's blowing out oil faster than I can fill it. If you're still driving it, better watch it because it might get real bad and you'll lose all the oil while driving. It's not that hard to drop a tranny just a lot of labor. But I wouldn't suggest it unless you're mechanically inclined. I'm gonna have mine rebuilt by Roger Reynolds I think I might be lucky to have a guy like him relatively close to me.