The 2014 transmission still should be covered under hybrid warranty.
I had my friend, who works in a dealer take mine apart a few months ago to do the noisy bearing tsb. I didn't have any problems but since the warranty time is getting short, I wanted it done because I want to keep the car for several more years. It updates the 2013, 2014 and 2015 transmissions to a 2016 model level. There are some bearings to be replaced, different bearing preload to be set, and a new case end cover.
In the earlier years, the bearing preload was too tight from the factory and caused premature bearing wear.
Mine was actually clean and good inside, no metal on the internal magnet, maybe because I change my fluid every year.