After working on the rear passenger-side wheel to replace the wheel studs started hearing vibration / noises like this: [ame="http://youtu.be/DTufUXuZwnk"]http://youtu.be/DTufUXuZwnk[/ame]
I have a bad feeling that I might have applied to much pressure to the axle while trying to remove the hub with the studs, damaging the axle. However, it might also be smth wrong with installing the old brake disc back on, especially since the noise seems to fade when I apply the brakes (can be also heard in the video).
Is there some science about how to balance the brake disc, or have I indeed wrecked the rear axle?

