Car has a new pressure plate and clutch. compression test was done and was fine. pulley balancer was swapped out , different fan. All did not help. Maybe It is the flywheel. It may have not been cut before new pressure plate and disk were installed. Vibration is felt in neutral. This I think would make sense. I will have ask my Dad if he had it cut/balanced ?
if it's felt in neutral and car is not moving it's an imbalance issue ... or 5 and 7 swapped ...
You never said , what year the engine is ?
and what do you mean by "pulley balancer was swapped out" ?
