My car is pretty new less than 2 weeks. Has around 700 miles. From today i feel something weird in gear shifting. Previously the shift was very smooth and now I can feel the gears shift a lot especially < 40mph. Also the car struggles to climb even small ramps, i have to press acceleration hard. I come from SUV and this is the first time riding a minivan. Is this normal ? I did not feel this until today. I called the dealership from whom i bought and they said as there are no warning lights and car is pretty new it is normal and may not be transmission issue. I feel the car is also a little louder than before. Not sure if this is my imagination or it is normal. Any advice ?