2016 front diff probs?

Hey, just wondering if anyone has had this issue: (Have a service appt, but it's a few days out)
I have a 2016 Platinum, only 5500 miles on it, so this is the first winter I've had it. The first couple of snows, I didn't notice anything, but with the latest snow I've now noticed that in 4WD on the highway, if I'm going above 50 MPH and let my foot off the throttle, there is a humming noise and accompanying vibration from the front diff. It also feels like it's slowing or dragging the vehicle a bit. Once I am back below 50 MPH , it goes away.
Anyone encountered a similar issue?
Thanks

 

I have a 16 crewmax with about the same miles...I have driven at highway many times this winter in 4hi and haven't had any issues. Pretty smooth actually until I make a sharp turn and remember to take it out of 4hi.

 

2016 here as well. No issues.

 

Another 2016 here, no problems at all, plus have been to the local dragstrip twice making about a dozen passes in 4Hi. good luck

john

 

No issues here either