Out of nowhere the rear end of the vehicle started making these loud, roaring and humming noises that eventually turned into a grinding noise. first thought the problem was the brakes; inner & outer brakes as well as the rotors were replaced with no changes, noises still continue. after that; all 4 tires were replaced with a full alignment, nothing seemed to help the noises at all. after further research of this problem; it seems there has been an issue with the rear end differential on this make/model vehicle for the last 5 years, that the manufacturer is highly aware of. i'm a mother of small children and my main concern is their safety in this matter; if this problem is allowed to continue, it could end up with the rear wheels locking up. this issue is very serious; better yet, very dangerous and needs further investigation. *tr