I bought the car from my uncle, and he did not drive the car much, b/c he has other cars as well. But i test drove the car it shifted fine going from 1st to 2nd, and if i floored it wide open throttle going from 1st to 2nd, the rear end would be all over the road going from 1st into 2nd. When i bought the car same senario. I drove the car 200 miles, and when i got there that is when i notice that the shift points had changed. Now when if i floor it wide open throttle going from 1st into 2nd, my car will redline and act as if it does not want to shift. But if i get off of it, it will shift.