Fluid Dampener How To.........???

I balancer will not fix an out-of-balance condition, unless it's imbalance was figured into the balancing itself. Sounds like the engine was not balanced properly. The right term is "harmonic dampner". It eases the harmonics from the firing pulses in the crank.

On the Fluidamper, you better have a good installer tool too. Dont just hammer or "pull it on" with the crank bolt.