There can be a few reasons why your Volkswagen DSG gearbox is making a noise. One of the most common reasons is that the gearbox needs to be serviced. If you're not sure if your gearbox needs servicing, it's best to take it in for a check-up. Another reason your gearbox might be making a noise is that the transmission fluid level might be low. You can check the fluid level yourself by opening the bonnet and looking at the dipstick. If the fluid level is low, then you'll need to top it up.