Strange harmonic noise

[JamesC]

Hi all I've got a 2013 Cayenne Turbo with 150,000 km on it. New to me. First thing in the morning when it's cold and when I start driving I hear the strange harmonic noise for about 5 minutes of driving doesn't matter what speed. But only while driving. 

 

Has anyone heard this before? 

 

 

[Loren]

 

Do this someplace safe...

Put in Neutral and see if the noise continues or not.

If it does not continue then it is likely in the drivetrain (transmission, transfer case, driveshaft, rear end}.

If it does continue then it is likely in the running gear (wheel bearing, axle shaft, or even warped brake discs).

[JamesC]

Thanks I tried that and it did not continue when moving and in neutral.. 

[Loren]

I would start by checking the fluid levels in the transmission, transfer case, driveshaft, and rear end. 

[JamesC]

Will do! Thank you 🥰