My wife's 06 B( has a strange shifting concern. Driving up a medium grade around 45 MPH, the trans will shift down to 4th and the car gains speed. Even with a steady throttle at the top of the hill it doesn't shift back to 5th. I have to go to sport mode and force the upshift. It is pretty consistant on the same road every Sunday after picking the kids up from Sunday school. I called the dealer and I'm going for a ride with a tech tomorrow, hope I can duplicate it. Anybody else have something similar?