'04 Cavalier, 115K. Tires are decent, and don't seem to be wearing unevenly.
Low-pitch droning noise at highway speed. Originally, this was only when steering left; but now, also when going straight. The noise goes away when steering right. ("steering" as in a lane change or road curve.) No vibration.
The car had a similar problem 5 years ago. That cleared after replacing the right front hub assembly.
Starting 2 years ago, the noise returned. It's probably getting gradually worse - at least, I'm more conscious of it. I replaced the RF hub again, but this didn't help. Also (for other reasons) I replaced the right front strut and both control arms. The stabilizer links look OK, AFAICT. I don't feel any play in the bearing when I rock the wheel top-to-bottom. There is a little play front-to-back, which I think is lash in the steering, and I think has been there all along.
Any thoughts would be appreciated.