anscv,
Thanks for the feedback. I brought my SRT-6 in this weekend because I heard some scraping/rubbing while coasting. Seemed to go away during acceleration or was masked by the increase in engine noise.
Picked it up today and they said it was the pads contacting the rear rotors. They also said that this was normal for the SRT-6 and SRT-8. I find it hard to believe that this could be a "normal" condition. I will bring it to another dealer next week. I hope it is not the differential.

Kevin