I had the same problem pulling my 5th wheel to Stone Mtn. GA. I made it all the way the campground, then the front seal ruptured. The Ford dealership charged me 800.00 to replace seal. It seamed to be fine most of the way home. Then the 4x4 light flashed off and on like a short. I pulled off and I was in 4wheel drive. now it won't come out. I need advice. A friend said to get tranny cooler and new pan. I need to know anymore advice.