We bought our 2004 Saturn V-6 AWD VUE and have had the entire rear differential replaced and that stopped the noise for about a month or two. Now it is back louder than ever.
Also, today I started the car after church and turned on the AC on full blast. It would not turn off, so I thought maybe it was a broken knob until I turned off my car, pulled the key out of the ignition and the blower was still on. I had to remove the fuse to get it to stop.
We are getting frustrated and after reading this message board I see there are many with this unfix-able noise issue in the rear differential. What is going on? Are they waiting until our warranties expire?