Then I'll go pick up a filter and a few quarts tomorrow!
I had the fluid and filter changed 4 years ago when I bought the car at 133K but haven't touched it since.
I have noticed with every single other auto I've owned a simple fluid changed made a HUGE difference in shift quality. I didn't know if there was anything unique about this application because I also have an Audi A6 also with the 5hp19. It locks up hard and stays locked up. (That one has almost 200k and has had 3 services, all after 100k)