1991 ford ranger 6inch lift issue

[91rangerbaby]

I have the bds 6inch lift, I've noticed when I'm flexed even the slightest there a loud metal on metal rubbing sound from under the truck, anyone have this issue ever?

 

[scotts90ranger]

The window in the passenger side beam is known to be too small and limit the shaft movement so I would look in that area. That's about the only rotary clearance issue I know of.