If i mount the trans cooler with the fitting facing downward, will i run into a situation where i get an air-pocket at the top of the cooler?

Brian,I have mounted some tranny coolers in odd spots,including on an RV with the fittings facing downward to due space and line restrictions,and it wasn't a problem.

alright, if i have enough line i'm going to flip it up, but if not then i wont worry about it.