[RICK LAKE]

Carmine This is a rare thing. They weld the wieghts and balance the pressure plate to .000. If awieght came off on a pressure plate, depending on was dampener you are running in the front of the motor, you may get no vibration, Alot depends on the weight that is lost. 1-2 oz's you will feel at rpms over 2000. .25 you may not feel until 6,000 rpm. Are you having a vibration in the drivetrain? They have a machine for GM called EVA. It measures the vibration on the car and try and isolate it. If you have the time, pull the trans and clutch and run the motor, see if the vibrationis gone. IF gone, it either the clutch assembly or possible worn out bearing on the trans input shaft. Is it possible that the bell housing was not centered on the block of the motor. If you are running an aftermarket bell housing this needs to be done before installing a new clutch assembly and other parts. Try the trans and clutch first and run the motor. This will point you in the right direction. Rick L. If you have a question call me in the evening 732-254-3536 est.