This fell out from under my car while I was driving down the highway a couple of days ago. It was so loud coming off, I thought I had lost an axle. It was super hot, so I had to wait for it to cool off before I could pick it up. Can anyone tell me what this is, and if my car is still driveable without it?? I was able to drive it home with no problems, but I'm leary to put it back on the road since I don't know what it is, or where it came from. My car is a 2002 Mazda 626 with auto trans. Thanks for any help.