How to fix a faulty transmission in Audi 80?

I have been noticing issues with the transmission in my Audi 80. It seems to be slipping gears and making strange noises. What could be causing this and how can I fix it?

It is likely that there is a problem with the transmission fluid in your Audi 80. You should check the fluid levels and make sure it is clean and at the correct level.

Another possibility is that there is a problem with the transmission filter. It may be clogged and in need of replacement. You should have it checked and replaced if necessary.