Hey y'all. I have had this leak for a few weeks. I'm not sure where its coming from. At first I thought it was tranny fluid but think its oil. Its appearing on the drivers side frame rail(all the way at the front). Is there an oil cooler on these things that it may becoming from a hose. Its on a 2000 5.4 4x4 F150. Thanks for any insight you can give.

 

could be valve covers

 

tranny oil cooler line - right above that frame rail.