I have a 2008 PT limited turbo. When I put it in either forward or reverse and step on the gas it goes but if I let off the gas it feels like the brakes are on. All four wheels turn freely when I have it on the lift and spin the wheels. The only codes I get are U1417 and U1418. This car does have traction control and anti-lock brakes. Another important thing I noticed is that when the car is running and in neutral it will not roll, if you turn the car off then it rolls freely. This has me truly stumped, so any help will be much appreciated.