I seem to have noise coming from the bearing highlighted in the picture. Is this a serviceable part? The whole section unbolts from the front diff but isn't listed by Porsche. The actual diff itself seems quiet when listening with a stethoscope.

Thanks!

 

Update, the rear torque tube is available separately, I'm just taking it off to make sure the noise is in there and not the diff...

 

That was my question: how do you know it’s the bearing? What kind of noise?