To Start...I am fairly handy and familiar with working on cars, but I have an issue here that is puzzling me. My wife's 2002 ZTS Mach Audio Focus, had the front left wheel bearing/hub assembly replaced in September 2011 (about 6 months ago). Now recently the car began to vibrate, grind, and has a slight squeal while in motion. I thought it was coming from the right side of the car, so figured NO BRAINER...It's the other wheel bearing. I replaced that over the weekend...WRONG!!! The sounds and vibration are still there.

Three thoughts are coming to my mind right now.

1. It could be a bad Intermediate Shaft Bearing (I'm not sure how to test for this)
2. It could be a bad CV Joint (symptoms don't seem quite right though)
3. It could be a faulty wheel bearing on the left side that has already gone bad?

Can any of you fellow gearheads give some insite on this? Any thoughts and suggestions are greatly appreciated!

Thanks,