g'day,
if you have a nissan with as EXTROID CVT transmission make sure you dont use any other oil but the original nissan extroid cvt trans oil, not even nissan ns2. no additives, ONLY USE nissan extroid cvt trans oil.
if you made a mistake of placing a non extroid trans oil, stop driving the car before you distroy the box.
if you had the cars transmission serviced by a non nissan service center, you go back to the mechanic and as them what oil they use and if possible show you the container. most workshop wont throw the container away (for the price of it they keep it as a display)
if you have a faulty cvt transmission i can help. EXTROID CVT cost roughly $6,000 to fully rebuild with 12 months warranty.
EXTROID CVT fluid im currenly buying them from japan for $450 per can, you'll need 2 = $900.- plus courier cost to you.