nick, culd be the spring flex, loosen up from the place it sits during the car change it's position, I have same thing, my driveway has a dip lead to road, when the car coming down to driveway turn to left or right the spring will make the noise, how do we found out? well, a friend stande outside the car, listen where the noise comes from, and located the noise.
it might be your case too.