It's been awhile since I have torn into a Ford IRS, but exactly how hard is it to replace a wheel stud on one? Would I have to repack the bearings and/or replace them? The reason being is that there is one snapped one on my mom's car and I know Ford isn't going to replace it because she's running spacers on her aftermarket wheels. I just need some pointers and leads on aftermarket extended/hardened studs as well.