I had a bent rim on my front driver's side wheel and it was producing a horrible thump sound when driving. I just put on my new SE wheels and I thought the problem would go away since the new rims are not bent. I know it's not the tires since I have new tires on the new rims as well. Although the sound is still there, it is not as bad with the new tires & wheels. I have also just completed changing out the entire suspension with KYB GR-2's and SE springs. I've visually inspected the CV boots and both are intact. If there is such a thing as something that sounds like a wobble then that is how I would describe it. I don't have but a very tiny steering wheel vibration, but nothing to worry about. Kinda sounds like someone constantly thumping a watermelon. When in park the sounds is not there. Also, the brake pads are less than 3 months old. What do you think this sound could be?

 

Just throwing out some ideas.....check to make sure that you have all the lugnuts on there nice and tight. the only other thing i can possibly think of is that there might be something wrong with your braking system, not specifically your pads....make sure your rotor is not bent and that the caliper isn't sticking...