How can I repair the automatic transmission in my Audi 80?

I have noticed some issues with the automatic transmission in my Audi 80. It sometimes gets stuck in a lower gear or has trouble shifting between gears. What steps can I take to fix this issue and ensure smooth transmission?

First and foremost, it's important to have the transmission fluid checked and replaced if needed. Low or dirty transmission fluid can often cause issues with shifting. Additionally, you may want to have the transmission control module checked by a mechanic to rule out any electronic issues.