Magnum 5.9L vibration

Well then if u still have a vibration maybe Hughes didn’t do it right. Kim
Looks like vibration is stronger, and does not changed after 3 different flywheels changed. I suppose it's coming from the torque converter or from somewhere else...
One like this. Picture came from another thread on FABO. I used a factory one like this on the 5.9 I built. No problems.

View attachment 1715611976
I have it, it's smaller (10`) bolt circle.