a big thanks to this forum. while searching the net for an answer to my Buick shaking violently problem I came upon a string from years ago initiated by Grampi with the same problem. All the posts were well thought out and along with you tube and my limited mechanical ability gave me the confidence to troubleshoot and change out my left front CV axle even though the boots were intact and it did not make the dead giveaway clicking noise when turning. Just like Grampi from years ago changing out the CV axle fixed the problem. Thanks BTOG.