Replaceing Pass side Axle shaft

slantnosec10

I have replaced the pass side complete axle and now I have noticed when going over speed bumps about 5 mph only the newly replaced axle side gives a little stiff hopping motion. I have ask others and only to hear from them did I Pre Load the suspension before you tightened up all nuts n bolts. At first No I didn't but later I loosen up all nuts n bolts that was involved in what I touched before and jack it up and with another jack under the lower A arm I proceeded to jack the A arm up and (Pre Load) the suspension and then re tighten up all the nuts n bolts and went for a test drive only to find that it really didn't do much better in the wheel stiff hopping motion. I then ask a mechanic about the wheel stiff hopping and he said probably I have a shock/strut going bad, that's kinda funny it happened only after I replaced the axle, that's too coincidental for me. **What the He!!**, can any body help me figure out this problem. Thanks in advance for any help or directing me in other ways