I've got a grinding noise which comes from the front right. It sounds almost like a metal on metal noise. I've replace the hub assembly, replaced the rotors/pads, and checked to make sure nothing was visibly rubbing/touching something it shouldn't. When the car is in N or P and i rev the engine, the sound does not occur. The sound is most noticeable under 25mph.
Dude I have the same thing with my 3.5 Charger. Mine is when I am stopped and its coming from driver side. Mine sounds like plastic pieces hitting together. I can not figure out what it is. Only does it when I am stopped and in drive.
Once i stop its gone. It's really annoying. I'm thinking of checking the back brakes to make sure its just not vibrating up the front but its a rainy day today.