Funny Noises From Front

[bigmike007]

Hey guys and gals i am having a little bit of a panic attack. I was cruising around town in my 04 silverado z-71 and all the sudden when i go to slow down i can hear something from the front clicking as i slow. I thought it may be my brakes. I pulled the wheels off and checked the guide pins and made sure all the bolts were tight. i also noticed i could not feel it in the steering wheel or floor board. I am thinking something in the front diff. It is speed sensitive the faster i go the faster it clicks and the slower i go the slower it clicks. Any and all help would be great. Also just a side question, how do i put a pic of my truck as my sig.