How do you change the transmission oil and filter in a 2002 Nissan Sentra?

I have been told you have to lower the valve body to change the filter and I have no idea how to do that.How do you change the transmission oil and filter in a 2002 Nissan Sentra?
1.Warm up A/T fluid.





2.Stop engine.





3.Drain A/T fluid from drain plug and refill with new A/T fluid. Always refill same volume with drained fluid. Fluid grade : NISSAN Matic ';D'; (Continental U.S. and Alaska) or Canada NISSAN Automatic Transmission Fluid. Refer to ';Fluids and Lubricants';. Fluid capacity (With torque converter) : RE4F03B (QG18DE) 7.0 l (7 - 3/8 US qt, 6 - 1/8 Imp qt) RE4F04B (QR25DE) 9.4 l (10.0 US qt, 8 - 1/4 Imp qt) Drain plug Tightening Torque : 29 - 39 N.m (3.0 - 4.0 kg-m, 22 - 29 ft-lb)





4.Run engine at idle speed for five minutes .





5.Check fluid level and condition. Refer to ';Checking A/T Fluid';. If fluid is still dirty, repeat steps 2 through 5.