sounds like you have broken some teeth on the fly wheel gear.Hopefully it on the starter itself which is easier to replace.
A 2000 Chevrolet automobile grinding noise can be caused by several things. The most common cause of a grinding noise is worn brake pads.
engine problems not trans.
Wheel bearing
Its kind of a grinding screeching metal on metal noise.
There are some websites gives an explantation about CNC grinding. They do not however, do not mentioned anything about starting the exact process of CNC grinding.
gnashing
valve variator
Sounds like a brake problem. Need to pull wheels and check the brakes.
check CV joints, if bad replace shafts and joints assembly
More than likely a rear strut or rear shock~Angelic Beauty~
The starter could grind if the bendix is sticking
This is because of rabbits communicating.