Are you using alignment savers on your front suspension?
Alignment Saver
I had a clunk and a little jerk in the steering wheel each time I would back out of the garage, and on that first foreward stop. This drove me crazy for several months.
After going over every nut and bolt in my front end, I finally found that the saver bracket on the drivers side had some very loose mounting bolts. I guess that my alignment guy either didn't know about them, or forgot to tighten them.
I smoked em down, and that solved my mystery. Hope this helps!!