okay, that would likely be your ujoints then. Thanks for the clarification.
i don't know if they are greasable but sounds like they are dry.

 

I have an 07 mega cab 4x4, 96,000 miles and have similar sounds, clunking mostly. I have gone through 5 mechanics, and we have finally discovered, all front ball joints bad, bad outer tie rod and both wheel bearings are starting to go bad. hope this is helpful.

 

As it turns out, the right front outboard U-Joint was toast!

Thanks again for the help, you guys were spot on!