It has been quite problematic because it just seems to happen when you are driving along and then you are stuck in a higher gear but with no power. I have had to back down hills because i couldn't make it over them - pulled off of highways bc I am stuck going 20 mph. Have taken it to multiple mechanics and now the dealer and they cannot find the problem. It only seems to do it when hot so by the time the mechanics tear it apart to look at it its fine -cannot determine the cause - frustrating to say the least!