For you guys/girls that are in the automotive field im sure you have run into this before. I am a service writer @ an independent repair facility. Service writer next to me writes up this truck beacause the customer said the brakes were making a grinding noise and pulsating. OK easy enough. We pull the truck in the back pulled the wheels to inspect brakes and found this. And this was the driver side. and off topic this is what I did this past Sunday. enjoy. We have actually seen rotors like this in the past on other cars.