Again, on my 5th gen, I had a rhythmic "rotating" noise. Hard to duplicate and Pinpoint. They heard a noise from the rear diff and placed almost everything in there. Noise was gone for a couple days, but came back and worse. Found out it was the driveshaft hanger bearing. Rusted from inside out.
I guess what I am suggesting is, let them throw parts at it. I know it sucks not having the car, but it needs fixed.
