Oldred

I have an 08 F150 5.4 Lariat. I pulled into a parking lot driving about 5 mph and I heard a thump noise. I than lost power and noticed that the truck jumped into 4H. I tried to switch the on dash switch to 2 wheel drive but it would not go back. The truck was clearly in 4H but seemed to have very little power. I pulled it into a parking spot and noticed some fluids had leaked. Any clue what this could be. I had it towed to the dealer but they will not get to it for a week.