i tried to get my rear drum off, but it seems rusted on. does it come right off, or does the whole rear hub assembly come off? and i highly anticipate that it still has the factory oem shoes on it with 102000 miles. do you think these need replaced? or do the rear ones wear hardly at all? how does one get a rusted drum off w/o cracking it? any help? i do not have a puller. thx