[dxrflyboy]

It sounds like one or more of the tires have broken belts. Jack up each wheel and spin it. A broken belt will cause the tire to be out of round and/or a shift in the tread.

The noise you hear is probably an exhaust heat shield. Depending on where it is, the cause is either a broken bolt or spot weld. Once the exhaust gets hot, the shield expands and distorts to the point where the noise goes away.

Your sunroof problem is probably a bad connection/ground. When you activate the switch, the power finds an alternate path due to an open circuit, causing it to operate erratically. Check the connector at the switch first and make sure none of the terminals are pushed out of place.