Sounds like my rear diff is making the dreaded whine/howl. I changed the fluid and it's no better at all. It also sometimes makes a bit of a clunking sound at very light throttle when coming from a stop and other times in slow parking lot type turns. Any advice from where to get a reasonably priced rear end? Cadillac dealership wanted over $6K to get and install. Pffft! No way. Also if I continue to drive it like it is will I damage anything else further and wind up spending more?