Transfer case fluid change? Anyone have it done?

[StingStingStingSting]

I just got a 2019 AWD Stinger with 140,000km/90,000 miles.

Getting both diffs done at the dealer (original fluid still), but they refuse to do the transfer case because its lifetime fluid and technically not serviceable. It has a fill port but no drain port. I have seen videos online of people draining with a pump from the fill hole and filling it back up.

Anyone have theirs changed? I'm keeping the car as long as I can and I'd rather change the fluid and make it last than wait for it to fail. Not much info online about people servicing them or having them fail in the first place.

Thanks

 

[Ohiocruiser]

I changed it on mine, at about 100k miles. The fluid was dark, and I used extraction pump for that. Took just under 1 quart

 

[Ah GetFd]

In all of the Stinger manuals, US/Aust/Europe the same item is printed. Not required.