2014 CRV AWD noise at slow speed
 

My new to me 2014 CRV AWD 80,000 miles bought at a Honda Dealer about 2 months ago makes noise at slow speeds the best I can describe it is it goes
rrr rrr rrr rrr continually This is when going straight and level down a smooth black top road at around 30 mph and appears to me to be in the rear axle area.
The noise is noticeable but not real loud Shifting to neutral and coasting it is still there then speeding up it goes away . I did not notice any noise at all when test driving the vehicle prior to purchase .. I was given a list of items serviced by the dealer before buying the car and it has on the list that the rear differential fluid was changed among a bunch of other things that were done seems to me the noise is more rapid than a wheel noise would be . Are Honda CRV's with AWD Known to be noisy like this ? if so I can put up with it like I say it is not real loud . Thanks Bob

Can you record it for us?