Reply to "Installing Rear bearings"

If it turns out that new studs still don't fix the stud spinning, you can try assembling the studs with some shim stock wrapped around them, as a temporary measure to increase the press fit. But it really means the part with the hole in it has somehow become enlarged and must be fixed or replaced. Some shops simply rotate the rotor 30 degrees and redrill to the minimum size, then press fit as necessary.