Need help with tranny issue.

It's leaking :D

What year, model & transmission? If it's in your sig I can't see cause I'm on the ipod.

The most likely places are the front and rear seals. You'll need to jack it up and see if you can find where it's coming from.
 
If its an auto it might just be the pan leaking. Get under there and check it out. If it is, just drop the pan, replace the filter, gasket, and fluid and you're done.