Transmission compatibility for '03 4.0 2wd

[s2per]

I've been watching ads for used transmissions and would like to know which transmissions will work in our '03 4.0 4x2. I believe (but I'm not sure) it's a 5r55w. I've found a couple of '04 models but I think they have a different last letter (S?)

What's going to fit and not be a wiring hassle? We just want to get it running again and sell the car.

 

[s2per]

Just asking again, but is there any other model 5R55 series autobox that will work in an '03 Explorer 4 door 4.0 V6 2WD? I've got to fix this car up and sell it!