Were your CV joints ripped on the old axles? Outer CV joints that worn after the boots have failed make a click , click ,click sound that increases with speed on a tight turn (like in a parking lot of taking a sharp turn). An inner joint may cause more of a rumble or give a vibration. I have seen re manufactured axles that were just tight and weren't re manufactured well. I have seen something as simple as the split pin in the cage that surrounds the axle center nut give a rattle as you drive around but you say it is a clicking sound. Haas it changed at all since changing the axles. Do you have to be taking a turn or could it be just on suspension rise and fall, I have seen the ball and socket joint in the sway bar link give and annoying rattle when driving over rough ground but it sounds like bad shock mounts or bushings.