GMC Trade Secrets
There are two clear and present choices here-
Take a light and illuminate the interior of the GD. If you see something, take it out.
You may have a bent or loose blade. Check your blades to see if they are all in alignment. Just a fraction of a degree off and it will make a terrible noise.
Unplug your disposal and with a flashlight, look into the disposal. You will see either three or four "cutting blades" in the bottom of the disposal. Look at them closely and compare them to see if a bone or something is stuck in the blades. Reach down into the disposal and move each blade to see if it is free and swivels. Likely one of the blades is either broken or has a foreign object stuck in it. If one of the blades is broken, you will need to replace the disposal.
Other people asked questions on various topics, and are still waiting for answer. Would be great if you can take a sec and answer them