Got a 2015 Platinum F150 that for the last 2 months I’ve noticed a vibration that comes and goes. At first I thought it was my utility trailer possibly doing it. There is I-49 in La. that I first noticed it on. It’s like every 5-10 seconds at times and then I won’t feel it at all. It’s not in the steering at all. It’s like it’s a section of the road. I have made several trips now without my trailer behind my truck and I’m noticing it a little more often. I’ve had the truck 3 yrs. now and the tires were new when I bought it. They have very good tread now and I see no cupping at all. It sometimes does it around 60, but more so around 70-75 when I’m on the interstate. Just feels like a rough section of the road. It lasts maybe 2 seconds then starts again 10-12 seconds later. Then it may just go away. The interstate is pretty smooth, seems like a short rough section every so often. I know not much to go on. The tires are not mud grips or all terrain either. But their not quite a car tire tread design either. The truck u-joints are quite, no clumping when shifting from from to reverse. Just does very well to me, but this vibration does bug me. Any ideas? I guess I’ll just get all 4 rebalanced but I don’t think that’s it.