Wow 15k is really preventive but I believe it never hurts to do it earlier! Especially you do it at home for basically no cost.I found the fill hole looking underneath and I saw this short angled hook pointing out. It came out easy and it’s just like a stopper in a bottle.
View attachment 535853
View attachment 535854
15k miles. It slightly darkened, most likely clutch material and break-in metals. I like changing transmission fluid early as the majority of break-in metals occur in the first 10k. There doesn't appear to be any filter, like a manual transmission. I’ll stick with the severe service recommendation of 47.5k from here on out.
Mine is at 42k and I just have it planned together with next oil change which has 10% left. Maybe it will be suitable to do transmission fluid change every 3-4 oil changes for me!