Just yesterday I noticed a popping sound right after I turn (left or right) & straighten the steering wheel. On the way home from work it got worse. I feel the "pop" or "thunk" through the streering wheel & floorboard. I checked all the lug nuts & they're tight. Within the last 7 months I've had a broken control arm replaced, all the ball joints replaced & front wheel bearings were replaced. (All of which greatly improved the handling) The shocks were replaced 16k miles ago. So the popping/thunking noise is a mystery. Unfortunately I can't take a day off & go to the mechanic before Friday. It has 105K miles & is a 2000 XLT V-6 automatic. Any guess as to what this sound is from? Thanks for any assistance.