Whenever I go up a long hill starting from 50MPH I notice that my RPMs would gradually go to 3000RPM. It would seem that the engine is working hard and has a slight vibration until I reach the top. Where you can even feel it in the steering wheel. It doesn't seem to want to shift gears unless I step on the gas pedal even more so it is past 3.5K RPM. Does anyone else experience this?