Just drop the oil pan. It's not hard. A bunch of 10mm bolts and it falls down. I've had good luck reusing the old pan gasket. Just clean it up good with brake cleaner. Then you can look for chunks oh cvt in the bottom of the pan.

I changed cvt fluid in a 14' murano. The oil that was in it looked brown on the stick and looked red almost like atf when draining it. I just filled it back up with the same universal stuff I use on the Mirage's and other Nissans.