Just because a tire has 4K on it, doesn't mean it can't have a problem. I've seen a tire just put on have a noise problem.

I have replaced my share of hub assemblies on cars, just never on a Crossfire yet. A bad hub assy, most of the time, will not show up on a lift, will not have play in it, etc... 99% of the time, if you are turning left, the right side has the problem, and opposite for the other side. When turning left, you are shifting the weight to the right causing the defective hub assy to magnify the noise. I say 99% because I have been tricked with that theory and ending up replacing both sides. Remember when you are turning, you are not only shifting weight, but your are putting sideways pressure on those bearings as well.

You need to be sure you don't have a tire problem before any effort is put into diagnosing or replacing wheel bearings.

Good Luck, James