Drove a 2010 GT Prem. Saturday, it had the conv. package, 19" wheel pack and the 3.55 rear axle pack. It says it includes the 3.55 gears with limited slip diff. I though all the GT's came with the limited slip diff. Is this correct or not, could not find anything on Ford's site about it. I have driven the Camaro SS and Dodge Challenger R/T and I really love the Stang best. May be my next car.