I have a used 2007 conv. automatic sidewalk with 31,222 miles on it. When I bought it one month ago it was driving great and then I started to feel jerking like the car wanted to switch gears and when going up a slope it didn't have the power to go up, it went up very slow. It was also sounding like the engine would rev up when slowing down. I took it to the dealer had them drive it around and they felt what I felt. So they said "Transmission adjusting spool ratio incorrectly, causing increase in rpm while driving. They did a fluid change and reset adaptations of driving patterns. It drove great after they did that one week ago, but then it did it again today. So upset about this. Can anyone help?

 

I'd take it back to the dealer 1 week it should be in warranty

 

If you have the opportunity to back it, do this better, because when you have the warranty you should be able to return it to the dealer. why should you pay your money for the thing out of work?