Macan S rear end noise
 

New to this site and hoping someone can help with a problem.
I have a 2017 Macan S with 60,000 miles. The car runs and drives great but I'm getting a whining noise coming from rear of car. It's not the tires, the noise gets louder the faster you go and even when you left off the gas the noise is still there. The trans shifts smooth and no issues.
Anyone have the transfer case issue? I know Porsche extended the warranty for this.
I'm trying to get a clue before I head to the dealer.
Thanks