On LE and S trim levels, the sedan ditches the old 4 - speed tranny in favor of a new and shiny Continuously Variable Transmission with intelligence and Shift Mode — CVTi - S. (cnet.com)
I mostly blame the 8 - speed tranny for this. (gmauthority.com)
The gearbox is quick in its responses but sometimes at low speeds the tranny tends to get a bit confused. (motorbeam.com)