Peterbilt keeps breaking airbag studs

Judging by that odd wear on the inside tire something is out of alignment

 

The answer to this riddle has been given

Three failures in one day. One of mine was failure of a new air bag. Replaced leveling valve. 100,000 miles later no more issues.

 

Leveling valve fixed mine.
Will it fix yours I can't say for certain. I didn't change anything but 3 air bags and the leveling valve on mine. Didn't do anything with any suspension components. One of the new air bags didn't last but a little over 100 miles before it failed just like the older ones.

Ran the truck another 100,000 miles with two of the old air bags and the two that I replaced. Didn't give me anymore trouble.

You mentioned the leveling valve was replaced on yours about 3 years ago? Had any troubles until just now with this?
Have you checked your ride height? From the picture of the rod that goes to the axle it doesn't appear to be bent. So unless someone has messed with the ride height nothing should have changed.

 

ITs very difficult to find a shop that does that stuff bro. Just start with lowering your bags. They are overfilled by alot and thats why the heck they are blowing out like that. So overfilled that they blow out the back. No support. . I would start by dropping them down to about 10.25 inches about where mine are set at. You can do this easily without going through all that nonsense in video. The forward axle has a weld through the centertube. Measure from that centerline on axle on the forward axle to directly to the bottom of the frame rail straight up and down. Adjust your leveling valve accordingly. Then take the truck for a quick trip up the road and get it up to 50-60 mph and listen for any driveline vibration or noise due to pinion angles. If none, you are good. Enjoy no bag blow outs

New leveling valve is only if the valve is leaking or it is over inflating becuase wont shut off. That would be easy to know. Your load gauge would be reading 120 psi if it isnt shutting off.
Start with the basics. If you can adjust your leveling valve and it stabilzes at normal unladen psi. The leveling valve is fine

 

Leveling valve when it fails doesnt shut off or it leaks air. Your load gauge would tell you if it is stuck open and has 120 psi in bags. Ill bet your load gauge reads normal unladen.

 

If it's growling like you said im betting ride height is off + some alignment issues with that tire pattern