Jombo Nailed it!!!!!!! Be Patient!!!!! Heat enough for the "Glue" (loc-tite) to melt... if you stripped the haed out already then you will have to carefully drill the head off. Don't drill so much that you drill all the way thru diff cover, but just enough to pry the diff cover off. Now, be sure you have enough of the screws left grab with vise-grip type plyers. Hea the screw and case enough to melt the loc-tite and turn counter clowise to remove remainder of the screws,, Be Patient!!!! I you do not have enough screw to grab then the party is over and you will have to order a new diff case and screws.... But Be Patient!!!!!