"Rumbling" or steady rotational vibration mostly occurs under 10 mph

I have this insane rumbling happening as described in the title. Even when I swithhhch into neutral and turn the truck off and coast it happens. Seems to get worse the longer I drive and will go away if I don't drive until about 5-10 mins of driving. I can feel it in the seat, pedal, not so much the steering wheel. What I've done: carrier bearing, cv axle (drivers side but I just rebuilt the whole front end suspension at the end of October a arms, shocks, tie rods, cv,) wheel bearings on both front wheels, swapped fluids on both diffs and t case, trans drain and re fill. Issue seems to be getting worse. 2013 base 4x4 4 door v6 4.0 6 lug. 115k miles. Had 30k on it when I bought it in 2022-2023 (my memory is shit). Thanks in advance for any help. My truck is my main source of income as a service tech and I just canceled a business trip because I can't be comfortable driving 5 hours then working all week and driving home like this.

 

I had a vibration at <18mpg in neutral and also 4wd. I never felt it in the steering, just the peddle.
I noticed one of my front tires was feathering so rotated my tires and it was still there. When I got new tires and an alignment it went away.

 

I feel like maybe I'm not feeling it in the steering wheel on secknd thought. Just got an alignment and it didn't do shit. Maybe I'll rotate my tires. When you had this vibration did it feel mechanical? Lien when I put the truck in p or n and rec the engine it doesn't Hsppekn. Only when movjng

 

It did feel mechanical. With the wheel feathering I though rotating the tires would alleviate it, but it didn't. I put in a lift a couple of months prior and started thinking it was the needle bearing or perhaps drive shaft angle. Fortunately, it went away when I swapped out my snow tires and wheels.

 

i know this might be a 101 level thing, have you checked the wheel bearing for play that will rumble and growl

 

was it rotational question mark like it seemed to move in sink with the wheel or the driveshaft or something like that? I've had winter tires on for a while, but they're the only tires I have. This only started around the time that having the winter tires became useful. I did rebuild my whole front end, but everything felt OK after that for a couple of months because I was in a hit-and-run.

 

I just put brand new wheel bearings in both driver and passenger in the last week or so. Both torqued to specs. Same with cv. After realizing it wasn't the carrier bearing, I did remove a bad CV axle from the driver side. I think the seal was broken or something like that. Which did solve some of my steering problems like the binding and the clicking, but the rumbling persists

 

I didn't do a Lyft per se, but I did switched from 265/70/R 16 to 265/75/R 16 but this was over a year ago. I've had the same nobby tires in it since

 

I don’t think my issue was rotational because the vibe was so rapid and I don’t think it correlated to a full tire rotation at such slow speed. It was only in the 10-20 mph range with it the worse at 18 mph. If I drove faster it went away. I was amazed it was the tires because I figured a tire issue would be worse at higher speeds. I also felt the vibe when braking.

 

It was the just outer most tread on one side of one tire that wore weird. They had a scalloped wear pattern. Tire cupping would be a more accurate description than feathering.
If your tire is already cupped a just alignment would not fix the vibration.

 

I'm gonna go ahead and say you were right. Put the truck up on jackstands and threw it in drive. Let it run for a bit and noticed I wasn't getting any of the noise. So I rotated my tires and threw on a new set of rear shocks I had sitting around and it's gone so I think it was a combination of a few things, but these were the final ones