Balance Problems...Vibration......

I have a 340/727 combo right now that is definitely having a balance problem, to say the least......takes all the joy out of driving.

We've eliminated the rear-end and drive shaft, and the gearing system of the transmission, since the vibration is there even at an idle.

It's like a wheel out of balance.....usually out at a low speed, then it returns at a higher speed to drive you nuts. The engine vibrates at 1400 RPM, and at 2800 RPM.(no doubt, the frequency would show up again at an even higher RPM).

If you idle the car, at 1400 it begins to vibrate EVERYTHING.....doors, mirrors, seat, EVERYTHING.....very annoying.......again at 2800, it drives you crazy while you're driving.

Now SOMETHING has to be the culprit........either the crank, or the balance of the internals, OR could it be the flywheel OR the torque converter???

The previous owner installed a 2400 stall.......doesn't slam into gear....pretty smooth.......but miserable to put up with the vibrating.

I need some advice on how to further isolate the problem. ALSO, I'd like to know if there is a fluid filled harmonic balancer or dampener available for the motor, and where to get one if needed.........anyone have any experience here?

he engine has lots of power, BUT it just ain't right......I'm afraid to romp on it until this is straightened out............

HELP with any experience you guys have had with this problem.......

Thanks........................... Doc :blob: