2001 prix, 3800 non supercharger 97,000 ,miles

This has been happening since I bought the car.. When it gets warm it starts to stumble at 18 mph and the trans starts to wine... I changed fluid and filter with no change.
At first it seemed to go away with maf unplugged..but the last time I did that ..after a while it started to stumble even with the maf disconnected...




I have a youtube video 3800 Trans wine - YouTube