I had the recall work for the front springs of my '98 Mystique done a few weeks ago. That is the one where they put shields on the springs so that they don't puncture the tires when they break. Since then, I have noticed a low moaning noise when I hit a bump a certain way at low speed. It lasts a second or so. It is either a resonance or something rubbing--I haven't figured out which. Is the noise normal after this repair?

Oh, I also replaced the tires about a week before--Firestone Firehawk SS20s. They might be the source of the sound, but I didn't notice it until after the repair.