I have a 66 3/4 ton gmc,when i pulled the drums off all i had to do was take off one wheel put a little wd40 on screws. go take off other wheel,put on a little wd40 on these skrews. Go back to first hub take a big skrewdrive & tap on it while removeing skrew. they came off without to much trouble. You may have to tap around the edge of drum to get it lose . notice i said tap and not beet. mikie