1. Yes that is it.

2. Yes it is in the same place

3. No, but if you look around enough in the differen FAQ files between here and Bay 13 you may come up with one. As I recall it is two holes, I usually replace them when they are in the car so you cannot really see it. It has to have two holes to work.

4. Yes there are the two holes that I mentioned in #3. You will want to clean it up real good with some brake spray cleaner and a rag, brush and best of all compressed air. Clean it up real good before you take it off of there. Often times when you take the old one off the larger O ring and sometimes the smaller one as well will stick to the trans. Make sure you get the old ones out of your way and go back together with new ones. You are right in that it simply allows fluid through it to the OD part of the trans.

I have had no luck with the crappy aftermarket OD solenoids in that past and I install only factory Volvos ones in my shop. They are not cheap, there is little mark up in them, but they work and they do not boomerang around and bite me in the ass.

Good luck,
Mark