Update - I tried swapping in my original MAP with my nieces MAF sensor....while it wasn't perfect, high RPM shifts happened much much quicker and smoother. Still a little bit of shudder on low throttle shifts when hot, but I think I'm going in the right direction (this was after driving about 50 miles, AC on, about 85 degrees out - so definitely with a hot transmission). This is only going off of that sensor combination for like 3-4 drives, so I'm thinking that letting the ECU re-learn with good sensors will help. Apparently the junk yard MAP that I got isn't much good.
I think I'm going to try a new MAF (although I hate paying $150'ish to buy one) along with a transmission fluid flush for now. I think letting the ECU reset with a new MAF will yield some decent results, or at least hoping it does so I don't blow $150 without any good reason....any problems after this, and I'll go with the TransGo with an extra cooler I think.
Either way, seemed to lift my spirits.
