I have an 01 Z28 and not even 15 minutes ago, at the near end of my commute, while doing about 45 MPH I hear a light popping sound coming from what seems to be my left rear tire... There's no real rythym to it but it does seem to go faster and slower as you speed up and slow down... It really sounds like a loose tire but I checked the lugnuts and they were all fine... Possibaly a wheel bearing? Any other recommendations?

 

Maybe a diff spider gear, should do it more when turning.