97 Cutlass shifting problem

I have a 97 Cutlass Supreme with a V6 auto with 167K. Love the car, but it started shifting funny a few months back so I parked it. I had seen a thread with the same problem but it had no responses. Now, I can't find it. So, I figured I would ask it again.
The tranny seams tight, no slipping, but it shift to early during both accel and deaccel. And it shifts pretty hard when it does shift. If you ease into the throttle taking off, it will hit 4th before 30 mph. Coming down, it will bring you into the next gear at about 3K RPM. I can manually shift it and it does ok, but it continues to shift into gear pretty hard. I have checked the vacum and replaced the moulator. I thought it may be the TC lockout, but it doesn't stall out when stopping.
Any ideas?
Thanks for your time.

This should be scanned with a trans function scanner to look at solenoid shift commands, also the tps could be an issue with this condition.