How to Prevent Leaf Spring Shifting?

U-bolts might have loosened up.

 

Crappy Pic but you can see the way it works

 

My last truck was a cascadia and it had them on the springs... they worked fine for me..

 

This is on a 2009 peterbilt 386

 

I want a better look at that spring from a different angle especially near the spring eye
Im very good with springs- Your U-bolts have to be really tight -Like 350-400 FT LBS

 

I want to see your spring eyes-These pictures don't show too much-I see where it spread on first pic-

The spring eye (Where your shackle bolts to frame and your Pins and Bushings get the Most abuse from all your turning you do while loaded.....Those are to be Greased and Checked regularly-

You U-bolts in the center section bolt to your Steering beam- those Need to be Very Tight,VERY TIGHT......Anything Loose will cause Popping noises and premature spring sag and spreading of the spring-By which seems to be your complaint.

 

Rust and corrosion act like a lubricant of sorts too. When I do springs and stuff like that I buff off all the rust on the mating surfaces of the parts. Helps keep everything together tight.