I am sorry to say, it is normal for this chassis. My rearview mirror vibrates so bad - even on smooth roads - it is almost useless.hi every one, new member to your very informative forum thankyou. I have a 03 spyder and the scuttle shake as we call it in england is really bad, is this normal. There is a constant juddering througth the steering wheel over uneven roads and can hear the body flexing. Its not as bad when the top is up. I've read a few threads on this site mentioning this problem but find it hard to believe that this is acceptable on a modern car.