You should [http://www.themotorbookstore.com/index.html Purchase a manual] or take it to a transmission shop if you are not sure on how to do it.
This vehicle do not have a transmission filter. All you have to do is drain the trans. fluid and refill.
Right under the air filter
Does not have a filter. There is a screen in the transmission which generally needs no service.
the transmission filter is internal so you would have to pull the transmission apart
the transmission filter is on the inside of the transmission
The 1990 Nissan Maxima came equipped with the 3.0L V6 and the RE4F02A automatic transmission. This type of transmission requires a professional tear down and overhaul to remove and replace the transmission filter assembly. It is not a standard pan filter with relatively easy access. The internal Maxima filter for the RE4F02A transmission is ATP part #B157.
It is on the pass side of the rear of the engine.
One in line fuel filter.
5 & 1/4 Quarts with filter change.
inside the transmission
How hard is it to change a 2000 Nissan maxima fuel filter
Inside the transmission under the pan.