My A3 has started making a low pitch creaking, almost knocking sound when creeping along in 1st gear. It's alot more audible in reverse for some reason. It seems to have started after I got my AP coilovers fitted, I had new top mounts and new droplinks (standard length) fitted at the same time aswell. I appreciate the fact I've not given much to go on but it's hard to tell where it's coming from, if I had to pick I would say its from the front somewhere. Any ideas what it might be or anything I could check for?