So just recently I noticed a weird rethmic bump in my truck that seems to be coming from the rear end. The truck is a 2wd non limited slip diff. At first I thought the truck had a broken axle but after putting it in the air and spinning one side tire the other turned the opposite direction like normal. I then put the truck under its own power and at idle only one tire rotated. I’m not to sure if that’s normal but again both tires rotated when in park. I also checked both sides for any sign of dragging but couldn’t feel anything abnormal. My only guess is it is something in the front end but I don’t feel in vibration or jerking in the steering wheel. The bump is almost like someone tied a board to the rim of my tire and I’m constantly running over it because it increases with speed.