When I bought my first Shelby gt 500 a 2009 model i thought and rightly so i think that it would be ready to go.That was not the case. After some break in miles i figured it was ready to try out I put the car in gear and gave it some gas not too much but more than average. What i got was a pretty bad scare. So bad that i am still afraid to run the car the least bit hard for fear of tearing something apart in the rear end.I dont mind spending money to fix the problem if i knew what it was.I just dont want to waste time and money trying to fix something that should have been fixed by the people who built the car. Namely FO MO CO and Shelby.