Hi guys/gals! I'm trying to figure out a strange sound coming from my Skyline. Every so often, say, once every 3 or 4 times I reverse out of my garage, I hear an awful sound coming from under the car. I equate it to a slipping belt, but a lower tone. It sticks around for maybe 10 seconds, and goes away. No issues driving as of yet, no clicking/grinding. It's just a loud howl and I want to address it before it gets worse. Has anyone had this issue by chance? I was asking some friends local to me and they figure throw out bearing is failing. Ideas?
Car is a '93 GTSt coupe with 165k K's on it.