I might be wrong as I didn't actually see the case, but after taking my 2013 in for an oil change, during a slow time the tech showed me the specs and diagram of the 2016 Transfer case and it appears to have a drain as well as a fill plug. You have to get under the car to do it but it's there. They also told me that there is a 30k fluid change recommendation if the case gets submerged or driven in harsh conditions, otherwise it's 60k miles for that. I think they may have learned their lesson. In hindsight I should have asked about the tranny too.
Next time I'm in I'll ask if they can do a print out for me.
Next time I'm in I'll ask if they can do a print out for me.