How do I troubleshoot a stuck gear in my Audi 80?

When shifting gears in my Audi 80, I sometimes encounter difficulty or it even gets stuck. What could be the cause and how can I fix this issue?

One possible cause of a stuck gear in your Audi 80 could be a problem with the shift linkage. This is the mechanism that connects the gear shifter to the transmission. It could be loose or damaged, causing the gears to not engage properly. To fix this, you can try adjusting or replacing the shift linkage.