Bad shudder in transmission?
 

I own a 91 New Yorker with a 3.3L auto. Just recently it has developed a BAD shudder when it us under acceleration especially between 30-40 mph. When it gets above that it is still noticeable but it becomes more of a vibration. I believe its in the transmission because as soon as I put it in Neutral, it goes away. Any help would be appreciated. Thanks[IMG][/IMG]