Ok, it seems like it's coming from the passenger front wheel. I've been under the truck several times now, and every bolt is tight on everything, brakes are all good. Manual 4x4 hubs torqued to spec and lug nuts on tight as well. Suspecting the front passenger wheel I got under the truck again today. I tried wiggling the wheel to see if there was any slop, and I couldn't budge it, spins nice and free as well. Then I basically started punching everything under the truck to see what would move, how much, and what noises they made.
This is what I found when hitting the front passenger wheel. It makes a solid metal clunk when hitting the bottom, but not the sides. While hitting it, I used my other hand to feel each of he surrounding parts. It seemed nothing was resonating much except for the brake dust shield.
My wheel bearings and seals came in today, but I need to pick up some grease before I install them. Any thoughts?