Audi A6 Avant: Humming Noise When Turning

Hello everyone!

Recently, our family acquired a second Audi A6 V6 TDI (AFB) quattro, manufactured in the year 2000.
I noticed that when turning or accelerating while steering, there's a distinct humming noise. It's not coming from the power steering, but from the rear axle. I strongly suspect it's related to the drivetrain at the rear (possibly the differential?).
Does anyone know if this noise is normal for a Quattro?
If not, what could be the reasons for that?

Thank you for your help!

DENNIS

Hi,

The rumbling sound is normal and actually comes from the all-wheel drive system, due to the large differences in rotational speed between the individual wheels.

Incidentally, it gets even worse with large wheels and a shallow offset; the problem is least noticeable with the (smaller) standard wheels.

Stefan.

hi garfield,

Please read my post about vibrations between 1500 and 1600 RPM.
VW V6 TDI Quattro.

'Your car has the same problem as mine, but it doesn't necessarily have to happen when starting off; it can also occur in first or second gear when taking a tight turn.'

best regards, harald