Whenever I get past ~4800RPM I have a chatter in my rear end. I've only had it happen whenever I was going straight, and my car's an 89 GTU, which SHOULDN'T have an LSD in it. Anyone have any thoughts on why it's doing it? I didn't think open differentials chattered, even if they WERE low on fluid.

 

^BUMP^

 

Hows the diff. mount? Mine chattered when I first bought it, and the rubber diff. mount was hella cracked, fixed the problem.