I was driving with my windows down for the first time in a while today when i noticed a strange sound coming from my front left wheel. It sounded like metal pieces crunching and clinking together whenever i drove around, but once i got above 20mph the noise went away. No vibration of any kind in the truck at all. It doesn’t get louder or quieter when i turn vs driving straight, and it will not go away when i switch into 4wd High or Low. I plan on taking it in to the dealership ASAP, but i am curious if anyone else has had this problem? I’ve read a lot about people having trouble with their IWE and the vacuum system used with it, but that problem seems to go away when switching into 4wd while mine does not. I have attached a video for reference. I checked my tires for debris and have also checked my wheels for debris as well, and have found nothing. I drive a 2015 XLT 4x4 with almost 68k miles on it. I’ve replaced my coilovers with the Halolifts 0”-3” model and replaced my UCAs with Icons, and am running 285/75r18 Ridge Grapplers.

you may check the inner wheel vacuum cylinder. It engages your 4wd sometimes the seal breaks and the gears will start grinding and pinging on each other.

I had a similar issues on mine after I had my ball joints replaced. A local off-road shop told me to check the wheel cylinders. Sure enough that was it.
Hope this helps in some way

Sorry for my terminology. It’s called a vacuum hub acuator.
https://www.1aauto.com/auto-locking-...BoCASYQAvD_BwE