Faint 'Grumbling' sound when driving/turning slowly

Car in sig.
I get a very faint grumbling/knocking around when I'm driving around slowly (parking lot). Seems like its more prevalent when I'm turning. Otherwise the car runs fine on the highway.
I'm thinking it might be the rearend (2.73), or something related to the lowering of the car :confused:
Any ideas.

tell your girlfriend to SHUTUP, she can have the dress next time(lol). idk sorry, had to say it :D

i'm going through that now. it's in the shop getting the bearing and seal replaced. it makes a loud gear whine at low speeds and sounds like something is rubbing against something. it only does it when turning.