How long will the leaky transmission in my '99 Cougar last?

I check my transmission every 2 or 3 days and have to add some Mercon transmission fluid... I just don't have another 3,000 to give to Aamco. I got this transmission fixed twice already.|||As long as you keep oil in it.|||Keep adding trans fluid and you should be OK, although there is no way to tell you how long it may last. If it is doing OK besides the leak, have the leak fixed.|||Depends upon how badly it is leaking and what internal parts are not getting their necessary lubrication. It may last a few months, but more than likely, you'll be paying Aamco much sooner than that. Good luck!