ORIGINAL: GPMAN

Yes, you are correct about the open rear end. It's called anti spin. I first learned of this back in February after my car was ordered with a non refundable deposit. It makes me sick that I cannot do a burnout or slide the car because of 1. the rear end, 2. the traction control and ESP cannot be disabled. If you watch any of the videos, the drivers are unable to spin the tires unless they do a brake torque and even then it starts with one wheel. How embarasing to punch the throttle and have the car lose power momentarily while the traction control tries to hook up. I'll take the car and most likely sell it.
There is a new rear end in the 09 made by Getrag but I'm not sure if it will be Possi Traction.