Hays On one of my rat-mobiles oil has melted thosr rear mounts,51 1/2 ton till the core steel of tthe mount is showing. It doesn't chatter,I pulled tree limbs out of the yard no chatter. I guess you could do that old circle track trick of chaining the left exhaust manifold to the frame to see if that would tell you anything. That is a rude way of testing this problem,it would cause the circle car to carry the left front wheel up off of the track. Stupid thing to do but might help you locate the trouble. Good Luck !!
