Having floored my automatic on two separate occasions in D4 on my way to 130 mph, the car doesn't shift at redline when going from 3rd to 4th.....its just the way it is....nothing is wrong with my auto. It's still pretty smooth and it is pretty damn willing to please cuz it will downshift two gears at a time when I want it to do so. It just won't redline 3rd. 1 and 2 are fine however.