...just a guess but the "whole lot of shaking" could be the clutch/pressure plate trembling when you let the clutch out.
Meaning the clutch may be worn out or the springs in the pressure plate getting weak.


1937 Chevy Pickup
In the Gallery
1952 Chevy Panel
In the Gallery
More photos
1950 Chevy Coupe
Pictures!

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile