Alright, so this may not be the answer you are all looking for. Just got over 40k and didn't want to wait to do the trans. I see mixed things at 30k, 50k and figured i'd split the diff and probably keep her changed every 30k like I did on previous vehicles. Inexpensive insurance like frequent oil changes.
Instant difference for slow speed driving, deceleration, etc. Vibration gone...no more sputtering/stalling/hesitation that I was feeling when slowing down from 35'ish or just cruising at neighborhood speeds. Smooth as butter and an easy reason to stick to a regular service interval for myself. Hope this helps!