That's a lot of good information, I appreciate it.
My mechanic was nice enough to come down and use his scanner (his shop is just down the road from me) and it threw a bunch of codes indicating one of the main connectors was not connected. Not sure how it wasn't since the thing can only be connected and locked or not connected and very loose since I tried to play with it when I had the pan off a second time. I wiped some of the excess fluid off and reconnected it, making sure it was locked and snapped in. Got it all put back together with the fluid re-added and it started right up. No more check engine lights and it seemed to of fixed my main issue, with easier shifting. It still sometimes shifts SORT of hard, like noticeable, but it's not HARD hard, if that makes sense. And the temp sensor works, it just takes a little bit of driving to get up to temperature. But all in all, it seems to be okay for now.
I was looking at Autel scanners on Amazon but kind of figured they're made in China. I'm willing to drop 1000 dollars on one eventually as I really don't want to have to rely on others to address any future issues. The thing I hate the most about working on cars is just not knowing what's wrong, and figuring out what it is. Physically replacing parts is a lot easier than figuring out what the problem is to begin with. I'll check out SnapOns though as I'd rather pay a little more for something that I would assume would be better.
