popping noise in front

My '91 4WD has begun a popping noise when I go over speed bumps(in 2WD), what could this be? It is all stock with no lift and I rarely get it off of the pavement. Also, where can I get a top quality rebuilt or new steering box?

Thanks,
Keith

My guess would be that it is a radius arm bushing, common problem and can be replaced fairly cheap

is it a clink, or a pop? mine makes a clink when i take off slowly and i was told it was my limited slip rearend. have you checked your u-joints lately? how about your hubs? it could even be your shocks, there's a million things.
um, try a junkyard for the steering. that would be the first place i look. the best deal your gonna get will probably be from a pull-it-yourself junk yard. good luck

Noisy

You may also want to check the upper and lower ball joints to see if they are worn out.

Thanks for the help. I haven't checked anything yet, just wanted to see if there was a certain area that should have been checked first. Olivesman, it's a pop. I have a open rear(no posi/limited slip). I thought about the junk yard for the steering box, but I would probably end up with one just as worn as mine. Well, time to go crawl under ole reliable!

its the radius arm bushings. get some performance urathane bushings so you dont have to do it again. there not that expensive.