Driveshaft torque cushioning device

Here is an interesting part on early Ferraris. It is a cushioning device so when you “snap” off the throttle, this gizmo will reduce the shock to the driveline. It seems like it would be a great addition on many cars but I have never seen anything like it on modern vehicles.

There are 8 pins with that have one end that has a peak. These peaks ride in corresponding grooves in a disc. A series of bellville washers push on the non-peaked side of the pins, the squared off end of the pins. When you drive normally, the bellville washers keep the pins in the grooves but if you snap on or off the throttle, the ramped grooves force the pins against the  spring loaded washers and cushion some of that torque.

Kind of hard to describe but the photos will tell the story. I realized that I do not have great photos but I will try to get some more up soon

Driveline cushioning device

Special driveshaft coupler