Wanted to give you all a heads up. I did a bunch of research and found its a common problem on this transmission type at around 145,000 miles. here is a link to a decent description of the problem and fix. I was :clap: when I heard back from mech that I was right and my transmission was fixed with new oil, filter, and gaskets installed for $100.

http://www.f150online.com/forums/tr...150-lost-overdrive-servo-clip-broke-pics.html