Almost brand new Supercharged (12K miles) started hopping/skipping on turns. When turning right (for example) the right rear wheel will shudder and spin (burn rubber) trying to keep up with the left wheel, which is obviously rotating at a higher rpm due to it being on the outside of the turn radius. I thought a differential was supposed to allow the wheels to spin at different rpms to prevent this. Dealer found no fault codes on the car. They don't know what to do. Said that the dash monitor screen was showing that the differential is staying closed on the turns, and this is then "normal". Hard to believe that the car is designed to spin/hop/skip a wheel on a turn.