Car will jerk when I accelerate

Four cylinder two wheel drive automatic 124,000 miles.

Dear 2CarPros:

The car will jerk when I accelerate a little bit hard from a stop. No engine check light or other malfunction light comes on at all. It is doing this when I feel that it is changing from the second gear to the third gear. It does not jerk at all if I accelerate slowly. Here is a little bit more information about the car. The transmission fluid is for lifetime according to the dealer. The car has a distributor-less ignition system. I have performed all the schedule maintenance. I use high quality fuel all the time. Please help me about what might be the problem or where I should start to check if I decide to bring the car to the dealer.

Jay

Thank you very much for you help.