2010 4.6 3V XLT 4X4...have noticed a greenish white milky fluid after the truck has been parked over night. When I crawled under, I found the point where it is leaking from, but not necessarily the point of origin. I am not what you would call mechanically savvy. The leak is on the passenger side near the axel, I think. I have some crappy pictures I will try to upload, but they may be a little too close up. Without jacking it up, I can't get a better pic.

I won't be able to get it in the shop for a few days at least. Any ideas?

 

Here are some pics..

 

From that pic it looks like an axle seal leaking. If its milky white then you have water in your diff. Either that or a coolant leak high up and landing on the diff.