Hmmm, that is interesting, so, I am lead to beleive that transmission fluid is Red, not clear.
Only clear fluid I can think of is brand new engine oil but would expect it to have a yellow tinge to it, put it on white paper, see if it goes a tinge of yellow.
My first thought could be that its just water coming from the AC system (Normal in this weather) but if it defo is oil, my recommendation would be to get it back to your Garage for them to confirm.