Any time we have a Stud that gets screwed up at our shop, we just pull apart what needs to be pulled off to get to them and just Hammer them out, Match up the new stud with the old one and GET A CASTLE NUT, they make life easier if you want to do it the fast way and it does work. Now just Anti Sieze the Stud and the end that is going to be pulled into the axle and just pull it through till it seats and your done. Thats all we do. and MClark does have a really good point, but can be somewhat time consuming and getting shop that can or will do it maybe hard to find. Just My 2 Cents.