Y'all I'm at my wits end here trying to track down a droning noise from my right rear wheel. First I replaced the hub and got a new parking brake shoe (I have a GXP), then we got a new rotor, caliper & pads (I've been lucky enough to warranty replace most of these parts). Even went so far as removing the parking brake shoe today. Still have the noise. What am I missing here? Is the new hub bad? Is it the wheel and tire?