ATI super damper?

the 'balancer' in this app (custom parts) must be neutral, only a damper for harmonics, Has none to do with the internal balance of a motor as crank had to be balanced to the crank/rods/pistons prior to installing the neutral balancer UNLESS the balancer was a cast crank model with the eccentric weight. IIRC you cannot balance a motor with any balancer attached, especially a fluidamper. I dont think there is a way to get it balanced without checking for a thrown convertor weight or bad U-joint. Then its balance time again.....That sucks.
<< remove all the belts and see if it still vibrates at your range to remove doubt of a bad fan>>