Nice post kid. I'm blown away that your engine temperature gets that high just sitting in traffic. I've never seen mine get higher than the half way mark and most of the time it stays just above the 1/3 mark. I have a 2.7L engine though, maybe it's cooler?
I saw posts about the inline filter, but several people brought up concerns that it could clog and you would really mess up the transmission. I guess if you have a temp gauge, you would notice when that happens.