[CC69Rat]

In my opinion, What you're seeing is the 'flat' portion of the axle perch where it sits on the trailing arm sort of rolls forward when you lower the truck. ..

You can flip the front mounts for the trailing arms over (just drill the rivets and literally flip the mounts upside down and replace the rivets with grade 8 bolts. (You have to drill two holes but nbd.)

This will roll that flat portion back to approx stock position and get you closer to factory trailing arm geometry too. You'll loose about .5" of drop as well. Ex a 6" dropped truck will look, ride, and feel like it has been dropped about 2-3". You still need shock relocation and adj track bar but the front bracket flip mod will help with the trailing arm situation.

Not proven fact.. just my opinion. That and .50 gets you a cup of coffee.