I was driving approximately 72 - 74 mph on an expressway and approaching traffic ahead of me. To move around this traffic, I switched lanes and attempted to accelerate. Immediately upon pressing the accelerator, the vehicle began to sputter, jerk, and decelerate, and the engine revved at what sounded like a very high rate of RPMs. The vehicle continued to sputter and jerk as it decelerated to a speed of approximately 55 -?" 58 mph. Once the vehicle reached that speed range, I was able to maintain my velocity; however, the vehicle continued to sputter and jerk until I brought it to a full stop. Additionally, if I attempted to accelerate, the RPMs turned at a very high rate and no acceleration occurred. I reported the issue to the dealership immediately and brought it to the service department when they opened the following morning. At the time of writing this, the vehicle remains in their possession and has not been returned to us.

- Tampa, FL, USA