I just purchased a 2003 Montana and drove it approximately 500km. Seemed to be a nice smooth comfortable ride. That said near the end of my trip, there was a loud wind noise /howl coming from the rear end. It sounded like it was from the roof. The noise is Speed related as it disappears below 80 kph. Anyone know if the factory cross bars make any wind noise on this vehicle. If they are a problem how do you remove them as the manual only shows how to slide them around.