mine does it, exactly as described on this thread.

2015 trail edition (with rear locker). 90,000km.

between 60 and 80kmph, if I am applying the throttle lightly (as I pretty much always am between 60 and 80), it quietly howls/whines. The moment I let off the gas, it goes away.

I've been living with it since last summer. I can't tell if I only noticed it when I got rid of some other noises, or it just started then. It drives really well. My gas mileage isn't great, but it's not horrible.

I just assumed it was the pinion bearing preload washer.... but some of you guys have had the rear and replaced with the same noise afterward...?