So I replaced my TCM and finally got a chance to go for a test drive.
Drove about 25 miles and then turned back around. So right as I was maybe a few miles from my house, while in D, I went to hit the throttle to go and the tranny acted like it was in neutral. Manually put it in 3 and that worked fine. I slowed down due to traffic; put it back in D and then took off like normal. But everytime I got to a consistant speed, it would then act like I was in neutral. But once I slowed down and then took off again, the tranny would act fine in D. Then it would do it all over again...
So bummed, really thought I had fixed my tranny issues. On a plus, there is still no CEL. So I may try and go and get it inspected tomorrow and see if that will work...