Transmission pan removal and Transmission service?

Here is a guide to help walk you through the steps and diagrams below to show you how on your car.

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

if you do remove the pan fit a new gasket and do pan bouts up evenly and not top tight that you distort the gasket.

Fluid Types

Recommended fluid 4 SPD .................... Nissan Matic "D" (Continental U.S. and Alaska) or Canada Nissan Automatic Transmission Fluid

NOTE:Dexron III/Mercon or equivalent may be used.

Recommended fluid 5 SPD .................... Nissan Matic "K"

NOTE:Using Automatic Transmission fluid other than Genuine Nissan ATF will cause deterioration in driveability and automatic transmission durability, and may damage the automatic transmission, which is not covered by the NISSAN new vehicle limited warranty.
Capacities

Fluid Capacity .................... 7.3 L (7 3/4 US qt. 6 3/8 Imp qt)

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