I have recently started to notice what can best be described as a light clunk on the front drivers side when going over small bumps, potholes, etc. Has anyone else experienced this and if so what should I be looking out for.

 

Check the mounting points for all your moving parts down there, starting with your suspension. Jack the truck's front end up and move the wheel around with some aggression and see if you see something moving that shouldn't be.

 

How many miles do you have on the truck?

 

check all the stuff Martian mentioned and check your coil springs .. could have a broken one..

 

Sway bar end links. I had a similar clunk, especially noticeable on uneven or gravel road. Was thinking ball joint, upper control arm but they checked out fine. Decided to try the easiest thing first and took off one of the links (very easy). Lots of play in it so I ordered a couple moogs from eBay for $33 (Part No. K80338). Installed two days ago and the clunks are gone. Feels tight again in the front! It's super easy and surprising how much noise/ looseness feeling can happen from that worn part. Check yours.

 

I noticed that as well on my '08 FX4. Would it be the same sway bar end links as mine? Not sure about it since i know some of the suspension stuff is a tad different on the FX4's. And if this seems juvenile, it's because I work on a lot of mustangs, not a lot of F150's. =) Thanks fellas.