If the 2014 is similar to the Honda Elements, the rear diff has a drain and fill plug, both are 3/8" square for a ratchet. My Element made a loud rumbling noise when making tight parking lot turns when I bought it at 58k. New fluid fixed that completely. I'm due for a change and plan to do it every 30k.
The Element used 1.1 qt and as far as I know, there is no suitable replacement fluid.
Oh, and as always, remove the top fill plug before you remove the drain plug, just to make sure that you can put new fluid in before you drain it out! Although, that shouldn't be a problem for a '14!