I've noticed a similar noise, not sure if it stops after while; seems to remain no matter how long I've been driving. It seemed to have started at the same time as my front brakes started making clanking noises the first time I braked after going in a new direction (i.e. braking in reverse, then braking in drive, or vice versa). Anyone else have a similar experience? I presumed it was the brakes. It's in for service to look at it now, but I strongly believe they won't be helping. The service advisor told me "Brakes do that after while" and I looked at him and said "No, they most certainly do not".