HELP!! Torque convertor and flexplate issue

If your using a flex plate with the cut out section, you have to use a neutral balance convertor. You can't use both. Even if the noise wasn't there you would have a bad vibration.

Hey there the thing is when I bring the engine up to 1500 and above rpm there is absolutely no vibration so would that mean that the convertor must be neutrally balanced then? It's so weird like I have never had any trouble like this before there is no vibration so I don't know what the issue is