when I'm at any half-severe angle w/ my Jeep, I get this really wierd and awful sounding grinding noise from under the jeep. I can't tell if its from the front or rear, but I do know that it's not a brake or anything like that. I have a feeling it's a driveshaft. I have never heard anyone else's Jeep do this though. Anyone have any comments on this? It's kind of worrying me. In case it's any help, I have 3 inch lift on it.