Peterbilt keeps breaking airbag studs

I have a 2011 peterbilt 386 with the low leaf suspension. The problem I keep having is for some unknown reason the rear air bag studs keep breaking. I've already replaced 4 airbags so this needs to be fixed. After the first stud broke we assumed the stud was damaged and put another bag on. Well after the 2nd air bag broke I made an appointment to get my leaf spring bushings done. They were pretty bad. The torque rods on top were replaced before the air bag issues started. The shop did a 3 axle alignment when they did the bushings. These bags typically last maybe a week or two tops before they break again. Anyone have this problem before? Please help.

 

Doesn't look like its breaking to me. Looks like its bending. Going on a limb and going to guess loose u-bolts or broken center bolt in the spring pack. That spring has got to be walking back and forth or it is severely misaligned.

 

Never said bending I said it keeps breaking the studs.

 

The leaf spring bushings were just done. All new u bolts and such

 

I never said leaking either. I don't see broken studs either. I see bent studs.

 

Yea I used wrong word lol

 

That one in the picture got fixed before it broke the stud

 

Been there and done this. Had three fail like this in one day.

Replace the leveling valve.

 

3 in one day ####

 

Let me guess rear axle too