Has anyone else had this problem due to lifting ya'll trucks? I only have 15k miles on mine and I just noticed yesterday that there was oil everywhere under my bed so it's not a small leak. Is this caused from Ford having bad pinion seals or is it b/c I need to change my gears? I did pull a boat back home the other day. It was a 5hr drive. I pulled it back with the OD off just to be safe. I thought if anything were to go out from having the bigger tires it wld be the transmission correct?