To test the struts to see if they are bad, bounce the front end real hard to a 3-4 times then let go. 1-1/2 bounces when you let go is normal. Also look at the struts them self, inside the coil spring where the chrome shaft is at the bottom is there oil residue? That will be the first sign of them starting to go bad. Changing the struts is not cheap so I was just saying to check them out first. Did this just start happening or did you just buy it? Why do you think it is not smooth is my question?