I picked up some new rear brake shoes. I’ll spare you photos of a brake job, but while I was cleaning up the backing plates I started looking closely at the axle U bolts
I don’t know what the half ton trucks use, but if you’ve got a 3/4 or 1 ton with the spring plates that trap and hold dirt - check your u-bolts.
I cut one off and had the local spring shop bend me up some replacements.