I get the same noise in the front of my ss m6 and the rear brakes grab when i back out of the garage and make a loud clunk. also the hole 1st to 4th shift thing every body pls i recommend putting in the shift eliminator some to do with the electronics in mine screwed up and now it sometimes grinds going into 2nd and 3rd this started after the car was only 6 or 7 days old now its a month old or so with 1200 miles and don't know when or where the tranny is or will arrive can't get no answer from anyone at my dealer and i'm having strong thoughts of trading the car