+1 to@asemaster. Do not remove the nut. Take the small clips off the other studs. Spray a little penetrating fluid like PB Blaster on the area between the drum and axle nut area. Let it sit for half an hour. If you cannot wiggle the drum off by hand, try beating it with a hammer from behind. Make sure the car is very securely supported with solid stands, not just the jack. Wear eye protection and carefully hit the edge of the drum from behind. Work your way around the drum and it will start to come off. You may have to hit it, wiggle it, hit it, wiggle it etc until it comes off. Sometimes they pop loose sometimes you have to grunt them off the entire way.
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