Someone told me this sounded normal to them, but I have my doubts about their mechanical skills. And it seems like it's just too bizarre and loud.

I've had quite a few axles go bad on me. They're crap autozone axles, but that's what I have. Anyway, what happens is I'll be driving down the freeway and either gas it or drop it into 4th and then I'll get a wicked vibration and a weird scraping noise. This happened to me today on the way to work, so I pull over and check everything out and all seems well. I pull out onto the freeway and get mild vibration only while under throttle, I can let off the gas and it goes away. I'm saving for a set of raxles atm so they'll be on shortly.

So when I get home from work I get under the car to check out the axles and see if I can spy any play or looseness that shouldn't be there. The axles seem ok, but when I rotate the tire with my hand back and forth, the diff makes a really odd sound. Kind of a clunking like there is a bunch of rocks in there or something. There is some play as well, I don't know if it's just how LSD's sound or if mine is going out or what. Anyway, I made a short vid of the sounds. I know sound vids suck, but I wanted to get your input on it.

Thanks, here's the vid:

http://video.google.com/videop...76966

Man, I watched it again and it really sounds like there is a bag of rocks where my diff is.