There are gear sets for the rear end that could let you drive higher speeds comfortably but being overseas they would be difficult to get and expensive. Likely you'll just need to learn to live with the noise. Just leave for your destination earlier and enjoy the slower drive.

Save a life, adopt a senior shelter pet.
The three main causes of blindness: Cataracts, Politics, Religion.
Name your dog Naked so you can walk Naked in the park.