mayb no 2nd and 4th? it would be nice if you were a bit more clear on that.
I imagine the sun shell splines stripped out. 2001 -2003 seem have a real bad problem with soft metal in that area.
Changing the fluid & filter will most likely NOT help.
Some people are like Slinkies... Not really good for anything, but they still bring a smile to your face when you push them down a flight of stairs.