Noise when turning after suspension work

I'm at my wits end! If any one has any ideas I'd love to hear them.

I have a 99 GT that I had suspension work on a few months ago. MRT Street kit, Maximum Motorsports CC plates, replacement outer tie rods, poly bushings and spring isolators. Ever since the install, there's been a clunk/pop noise from the front when the wheel is turned all the way and going over a bump- like turning into a driveway, sharp U-turn, or backing out while turning.

Today, I took the mechanic with me to reproduce the clunk/pop noise. He retorqued all of the suspension components and found nothing loose in the springs/shocks/cc plates. He did say that the steering rack was a little loose but that he never heard that noise from a loose rack. I know others have had this problem before. Has anyone fixed it? I've read a few posts about replacing the rack and the clucnk was still there. Did replacing the rack fix the clunk for anyone? Maybe the bearings for the MM CC plates are defective and binding. How can I tell if the bearing is binding or not?

Thanks for you help,
Jim