Different vehicle, same problem. I did not want to beat on it so hard it hurt the wheel bearings. Gentle heat (propane) did not help. I ground two clean spots on the outside of the drums and welded sections of 3/8" rod as cleats. Then used a good sized gear puller on the cleats and axle to get the drums off. Worked like a charm. Tension on the puller plus a hammer blow broke it loose. New drums required however.