Wheel/front end issue- need help

Hello,

So Monday I went out and went on some dirt roads in the woods to go shooting with the bro. I used four wheel drive a little on the paths. Later when I got home and turned my truck back on to go out again, a womp womp womp sound started at lower mph (25-50) and when I go on the free way it either goes away or I just cant hear it (assume i just cant hear it)... and it sounds like its on my passenger side wheel in the front (could be wrong, somewhere in the front though). It also seems like when I put in in four wheel the womp sound goes away. Kinda odd it goes away when I put in four wheel... I had my tires rotated etc. about two weeks ago. Anybody have any ideas? I don't know if its wheel bearings or what.. I just find it odd that it pretty much goes away when I put in back into four wheel.

Thanks.

2013 TRD PRO

 

Maybe search:
front differential needle bearing and see if that sounds like your issue.