So while I'm driving on the highway, I can hear a loud humming noise coming from the back right side of my car. Maybe my left side also. I'm probably driving 60-65 mph but once I go pass that limit, the noise seems to go away. I can also hear it when I'm driving the city limit to, around 30-45. I'm just curious, could it be my wheel bearings wearing out, or can it be my Cv axles blowing out soon or has it already? Let me know what you guys think, or have already experience the problem. Thanks .