Humming coming from my 01 Boxster, any suggestions on what to look for

[Jasper7821]

Originally Posted by Gilles

Jasper, regarding your driving test were you able to hold the steering wheel for a moment or so, to allow you to load the bearings?

If your wheel bearings are ok, the only other thing to check are the CV joints...

I live close to the base of a mountain, so I went downhill straight from 40-70mph and jerked the wheel both directions and no difference. Then I went on a twisty road and drove a few miles fairly hard with holding the wheel steady on the curves and still no difference in sound.
So I think it’s definitely in the rear. Any way to check if it’s the CV joints. And the boots were changed a few years ago.