Rear End gear Whine

You said that you only changed the ring gear? If you still have the original pinion gear in it, that would absolutely cause a whine, or in extreme cases, grinding, clunking noises. Mine whined for two years under light load (not accelerating, and not braking) and is now starting to quiet itself down. I think my gears are starting to wear together.
If you changed both ring, and pinion as a set......then, sorry, hopefully the previous posts help you out.:oops: