It might be because you changed the springs and not the shocks as well. I know that TRD says the springs will work on factory shocks/struts but the truth is they don't last long if you don't have a spring/shock combo designed to work together. I got a nice set for my Jetta and did my research finding the best one I could. Lots of complaints were the ride getting stiffer, ride actually dropping lower after breakin period and other wear issues. However the ones I got the same ride and height and love them. So not sure but the shocks may help. If not then I may just need to wait till other companies make a set.