I have a 2015 f150 lariat 157" with the 3.5 ecoboost. Have noticed when using 4x4 high there is a very noticeable droning/whining noise when making turns. Happens when turning into driveways or going around turns in a subdivision. Truck is not bucking like the drive lines are binding either when noise happens. I use 4x4 high on snow covered pavement when the noise happens.

Is this normal? Doesn't seem right to me...

no noises when turning in 4 high?

not that I have noticed but I mostly stick to 4A if roads are iffy, I haven’t taken my truck off reading yet so I haven’t used 4H alot