How to troubleshoot an issue with the Audi 80's automatic transmission?

I am experiencing problems with my Audi 80's automatic transmission, including difficulty shifting gears and unusual noises. What could be causing this and how can I fix it?

One possible cause for this issue could be a low transmission fluid level. Check your transmission fluid and top it up if necessary.

Another potential cause could be a faulty shift solenoid. Take your car to a trusted mechanic to get it checked and replaced if necessary.

It is also recommended to check for any debris or debris that may be stuck in the transmission filter. Clean or replace the filter if needed.