Anyone having issues with vibration attributed to less wheel backspacing?
Rebalanced tires twice.
Rotated them around.
Wheel backspacing is 4.5".
I'm trying to see how much of the wobble I can attribute to mud terrains and/or poor wheel balancing.

Did you also have the truck aligned?

Twice. Once when the leveling kit went on and once when the new tires went on.

Any lift?

Lift/Leveling kit. Daystar. Just the coil spacers. I also run firestone airbags on the back for towing my buggy.

Wheels are lug centric as well.

How's the pinion angle look? I wouldn't think a leveling kit would cause driveline vibes, but did you put the lift and new tires on at the same time?

That might be your problem. I remember reading somewhere about the stock wheels being hub centric.
https://dodgeforum.com/forum/4th-gen...shimmys-2.html

--Hop

Pinion angle is fine. Lift went on and it was aligned. Tires went on and it was aligned again.

The stock wheels are definiately hub centric. Though I can't really see a reason why the studs would not locate the wheel properly. I always thought that hub centric was really just for safe load capacity.

Some rims come with cetering rings that make the rims lug centric.

Hub centric rings made a noticable improvement with my wheels. I got them off eBay for $8 shipped.