Larry: The sound that you are hearing might possibly be coming from two things. Mind you this is a guess on my part because my 1923 did the same thing. 1. The anti-rattle springs in your clutch might be worn out and broken. Remove floor boards and tin cover on bell housing and look at clutch. These springs should be at the back of the clutch pack. 2. Check to see if the rear engine transmition mount is behind bell housing. If it is between the bell housing and engine this will cause the clutch to vibrate front to back and be very annoying. The rear engine transmition mount should be behind the bell housing. RAI
