Humming noise after 4wd

Hello guys.

I have a 3” OME lift on my 2017 sport. The other day I put my truck into 4wd to drive through my field. When I took it out of 4wd everything seemed fine. But now I get a humming / vibration noise from 15-55mph. It seems to go away after about 20miles of driving. But it comes right back after the truck sits for a couple hours.

I tried putting it in 4wd high and low and back to 2wd. I shift the truck to neutral when shifting to 4wd.

The humming / vibration doesn’t match the speed or the truck or RPM of the motor.

Has anyone ever had this issue????

Thanks in advance.

 

Clean the inside of the wheels with a pressure sprayer... Just a hunch.