[yotermanic]

I didn't have the problem on my car, I drive a Taurus, but I worked at a Ford dealership until this January and we did rebuild a bunch of those rear ends for noises...we rebuild a bunch of all rear ends for noises it seemed. If the tech rebuilding the rear end shims it up right then the noise shouldn't return. There were some cases where carriers would warp causing excessive ring gear runout which makes a noise, but most technicans just replace the carrier as well anymore.