How to troubleshoot a noisy gearbox in an Audi 80?

I've been noticing a strange noise coming from my Audi 80's gearbox whenever I shift gears or accelerate. It's been getting worse over time and I'm worried about potential damage. Does anyone have any tips for troubleshooting and fixing this issue?

First, check the fluid level and condition in your gearbox. Low fluid or dirty fluid can cause strange noises and should be addressed immediately. If that doesn't solve the issue, it may be a worn or damaged gear or bearing, which will require professional diagnosis and repair.