Nissan Serena 2000 with hidraulic gearbox , automatic with 220.000 km.Gear box SR20 and gasoline motor.We did put a wrong oil , not NS-1. It was a problem because i cant use the car . Now I buy a oil NS-1 , and I did change it , leting discharge the old oil for a one day. Now I find that the gear in not changin the march and is always in low march .Is a problem with the belt? o with other part.

Nissan Murano gear doesn't change which makes it impoosible to drive> What can I do?

When you put incorrect fluid into a transmission it is absorbed by the clutch material (yes there are multiple clutches inside)...therefore it may not be possible to restore proper operation without replacing all internal friction material.
One thing though: When you drop the pan to remove the oil, you are only changing about half of it.(the remainder is inside the torque converter) If you change it multiple times,permitting it to idle, then changing shift positions, you can reduce the concentration of incorrect fluid by doing so. You don't need to replace the filter or the gasket while doing this, and don't even need to pay attention to any minor pan leaks. It will require a lot of oil though. If near-normal operation does not return after three changes I'd give up. If it does get better, do it one more time and add some lucas additive in the final change, then service again in about 4,000 miles. The length of time driven and miles you drove before finding your mistake are important. If either are more than one day or a few miles, don't bother, and just have the unit rebuilt. One thing for sure is that you will never make that mistake again!!!
Good luck!