FabTech 4" lift problem k1071

[Chevysousa]

well once i got my lift installed a couple days after i noticed like a pop sound coming from the front right and left tire area and it only occures when i hit like a small uneven crack, bump or anything of that sort. i felt it in the cab of the truck ......the installers nore fabtech cannot find why its doing this, But fabtech said they are going to send me a uni UCA and see if it will fix the problems....does anyone have any ideas???

[Szyikowski]

Looking into this kit with the uniball. What do you think of it?