I just replaced my front struts on my 1995 540I. The KYB inserts that were in there were blown (completely). I replaced them with Bilstien touring inserts. After replacing them I noticed a audible vibration noise that I feel ever so slightly in the wheel. The sound seems to resignate and shoot down the car. It almost sounds like I have a can of fix a flat in my tires. The vibration noise continues all the way up to the higher speeds and does not go away. ANy suggestions? I see talks about thrust arm bushings, but how do you check these?