not hard at all.. pull the cover off.. pull your drums off.. take the 8mm bolt loose.. push the big pin it out.. pull the C clips off and pull the axles out.. inspect your seals and bearings.. if bad change it.. if not then dont worry about it.. stick the other axles in, throw the c clips in, put the pin in, stick the 8mm bolt in and throw the cover back on.. and of course whatever your doing with brakes