Audifan1

So far I replaced all tires, new right oem wheel, front alignment, did front tie rod ends, left CV boot, 2 lower control arms on the left front wheel.

Here is the deal. Ever since I bought the car (almost 1 year now) I get this vibrating noise while driving. It is hard to explain for me on how it sounds or what noises it makes, but it is a rather "quiet" vibration that can be felt when driving, and the noise goes away as the car is slowing down. To give you an idea, it's kind of as if something was rubbing and the rubbing gets less and less as you slow down. Very annoying, quiet noise but it can be felt even while the radio is playing.

I spoke with my mechanic about this issue when I got the car and he told that the differencial could be bad. But, to be honest with you, I don't think he really knows what he is talking about. He is a great mechanic, but I think this issue stumped him.

What could this be?
I read the repair histories of cars with milage close to mine and I never seen anyone replacing the diff.

I'm thinking maybe the FRONT DRIVE SHAFTS, maybe either motor or trans mount, or the steering rack.

THIS IS A QUESTION FOR REAL SUSPENSION, DRIVETRAIN GURUS.

Audifan1

I think it could be:
Bad Drive-Shaft,
Bad Motor or Trans Mounts,
Bad Axle or Axles,
Bad Steering Rack ?
Bad Diff,
Bad Wheel Bearing,

It is a hard one, and I noticed that there is another post about this issue.
Has anyone else experienced this issue?

4Driver4

Are you sure it isn't a wheel bearing? The "rubbing noise" makes it sound like that might be it. Maybe center drive shaft; how does the center bearing look?

I doubt very much it is one of the three diffs.