rear end noise (the car, not me)

[Austin]

(I had posted this in another thread but thought it might get overlooked, so I wanted to post it here too)

Just in the last couple of days I've had a strange thumping noise from my rear end too (okay, the car's rear end). It happens anytime I turn the wheel to make a roughly 90 degree turn. Low speed of course. It doesn't make it (yet) on slight turns, like a moving lane change type of turn of the wheel, or shallow turns.

The sound is a REALLY deep throbbing sound - like a car that's nearby with a big subwoofer booming (it sounds exactly like that actually - I have to concentrate to make sure I'm not mistaking my noise for a riced out Honda Civic with 15" subs blasting away). Also, if I'm sitting still and just turn the wheel lock to lock I get a very low continuous "subwoofer" sound.

I'm no longer a fan of crawling under the car and pulling wrenches (comes with age I guess), so I'm hoping it's nothing too expensive (or at least too involved for me if it's expensive).