Massive internal failure. you technically can replace components of the transmission, but it is far and away more cost effective to simply buy a used one. For a 2011, you can get a transmission from all years, but there will be a sensor on the 2013-2016 models that isn't used on the 2010-2012 cars. (for any 13-16 owners reading this, you will need a 13-16 transmission)You can feel it go into gear but it just revs after that. I have asked transmission shops and they just want to replace the transmission. Someone please advise if this is true?