plumbous blimp
+1y
first off, welcome to the scene.
i haven't had to deal with the rear end of my truck for some time, so i'm not completely sure. if you remove the drum, you might see some bolts that hold the axle into the diff. you may find that there is a hole in the mating surface that the rims actually bolt to, and that there are bolts that can be accessed through that hole when you rotate it. if you undo those bolts, the axle should come out. However, that is only if the axle is held in in that manner. hope that helps.
oh, and try putting some antisieze on the threads so next time the lug wont sieze and break a stud.