Step by step process for changing transmission fluid needed?

Sure, here is a guide to help you service the transmission in your car with instructions below as well:

https://www.2carpros.com/articles/how-to-service-an-automatic-transmission

Model RE0F09B .................... 10.2L (10-6/8 US,qt)

Model RE0F10A .................... 8.3L (8-3/4 US,qt)

Type .................... Genuine NISSAN CVT fluid NS-2

NOTE: Use only Genuine NISSAN CVT fluid NS-2. Using transmission fluid other than Genuine NISSAN CVT fluid NS-2 will damage the CVT transmission, which is not covered by the NISSAN new vehicle limited warranty.

Check out the images (below). Please let us know if you need anything else to get the problem fixed.