[Mgs] rear end noise

[Paul Root]

So I've had my car out for 2 weeks now. Driven it twice. With the top up.

With the top up, the noise from the rear end is more pronounced.  It's also
definitely louder on trailing throttle.

I think it's coming from the rear left, so I'm guessing it's not the diff.
Perhaps the exhaust?

Does anyone have ideas? To me, it's not quite a grinding, but I don't know.

The second time out, I was actually teaching a kid to drive a stick. He just
turned 18, has been an Eagle Scout since just under 15, and is going back to
summer camp to be a councilor for the 4 year in a row. He's told this year
he'll be driving the delivery truck, with a stick shift. He said he'd driven a
stick only once before. He did very well. Of course, I started him with the
choke way out, so it was hard to stall. But he picked it up quickly. Someday,
I've got to teach my 17 year old, and my wife.