I have an 06 F150 4x4 with 35s and a 6 inch fabtech lift. I have a noise coming from my truck that sounds when the truck articulates. The sound makes a popping sound and only occurs when the truck is being flexed on uneven surfaces. I have gone to several shops around the area and all have different guesses on what it could be. Two of them say its the leaf springs but if I start there I want to at least hear what you guys have to say about it.

*I have already tried spraying the leaf springs several times with grease with no luck.

Has anyone else heard of or have had this problem?
If it sounds like the leaf springs, should I just start by replacing the bushings and see if that fixes it or the whole springs?


Thank you for the help the sound is driving me crazy!