I just installed a 6inch Pro Comp suspension lift and know when i am driving down the road when i go to brake the tires make a whopping noise. especially when i am really slowing down and i press on the brake outside the truck you hear whoop then a pause then whoop then a pause then whoop. Help me if you know what the problem is!!

 

if its your tires making the noise for shure, then its sounds like your toed in to much and need an alignment

 

are you caliper bolts/mounting brackets tight on the knuckles?