I just replaced my two from hub assemblies on my 2005 f150, certified( part source) parts, and eight days later I hear noise again, not as bad but still not good. I noticed a hex plug right by where the anti lock break line is, what is that for? is it a grease inlet? maybe certified didn't pack the hub vey well with grease ?

 

What kind of sound are you hearing?

 

they are sealed bearings so therefore no grease inlet. I would contact who you bought them from

 

or troubleshoot the entire system...

 

https://www.f150forum.com/f72/how-di...m-esof-186872/

 

It sounds like a can of nails, like before I changed the hubs but not as bad and goes in and out, at low speeds, don't notice at high speed, the sound will also go away when I engage my 4x4 right away

 

It's more than likely not your hubs then. The link VTX1800N1 shared is golden. Follow the steps in that thread to figure out what is going on. Good luck man. Sometimes this is an easy fix, and sometimes it can be tricky.