well ive heard many of things to put in a diff to give it more grip from thick oil,to glue from a glue gun to jb weld or a spool of sort..i thought uhh thats no good they want it to slip for a reason..here latley ive been noticing that if i did have the rear locked a bit i could of saved my truck alot more..I decided to go with silly putty..Any one else ever try this..I dropped my diff out tonight and filled her up seems tight with some give like i want..hope it just don't turn to mush after a little bit though..ill keep u updated with some pics of what goes on..Anyone else ever done this though?Or whats some things you fella's have used..Thanks