It could be a number of things occasionally I used get that clicking you describe not just over bumps but ireggularities in the road, sewer caps, uneven pavement, cracks etc and yes I know it can drive one crazy! Their are a few things that are easy and CHEAP you can replace yourself without getting hustled by a mechanic or dealer who probably will try to convince you your gonna need a whole new control arm or tire rod assembly. First inspect your front end for play in the ball joints and tire rods, simply lock the wheel jack up the front and give a good tug on the tires at the 12 and 6 oclock for ball joints and 3 and 9 for tie rods If you get any excessive play then it is one of those componenets. There is a sticky on replacing front end components if you think your up to the job yourself. If its not thoses then check the sway bar bushings and end links. If they are the original most likely the are worn and can be easily replaced by a DIY'r in less that 20-30 minutes. that should eliminate the 'click and if not maybe a good alignment might be thats all in order. My issue was indeed the sway bar bushings replaced them with some polyurethanes and havent heard it since. Now if I could just get rid of that damn squeak from the leaf springs!!!
