It appears that the MY14 trans seems to run hotter than the MY11, 12 & 13. My MY12 trans usually sits around 78deg on a normal day whether I'm towing or not and will climb into the 80's if I have to push it up a hill.
This photo was taken with my 2T boat on the back. As you can see, pretty extreme conditions but didn't get any higher than this.
Unfortunately I can't monitor engine oil in mine.