Odd nosie from rear, even wierder fix.

So I've had a odd noise from the passenger rear end for a few weeks. Got worst when turning so I checked and repacked both rear wheel bearings. Didn't fix it. 

So today I went to swap the axles, and found my problem. Car was factory axles, which have a rubber cover over top of the steel straps that hold the cv boots on. Somehow some mud had gotten under it, it was rubbing bottom of the shock! Never would of noticed it, but my spare axles didn't have the cover. Taking a closer look I noticed there was a shiny spot on the outer one. And sure enough shiny spot on the shock.