I know there has been a couple post about rearend noise. I definitely appreciate the insight you guys give as I wasn't sure what I was hearing and after reading other post decided to take it in and get her looked at. I took it in last week and they said they were going to resplace it. So the new one came in Tuesday and I take it in and drop it off. They start Wednesday and then I get a call. The new rearend casing has a crack in it. So it will sit their for a couple more days waiting on another new one to get shipped on from Detroit. Should be here Monday. To go on my service guy has a Challenger HC and has already replaced his rearend and said it makes the same noise. The dealer is very interested to see if mine does as well, to see if the one they put in the Challenger make have been shipped bad or if mine will make the same noise. I will keep you posted.