hey, i had a leak a few day ago from the rear diff so i decided to redo the gasket seal on it, i took the propshaft out and then unscrewd the bolts on the diff. all bolts are off but i cant seem to pull the diff off, theres a little play but its as if its stuck on some thing. i tried rocking it back and forth but no luck. do i just need a bit more force on it? :S