Some of you that think they don't have it might actually have it.
What it sounds like is the "tink" sound you get when something metallic is cooling down. For example the "tinking" sound when a hot exhaust is cooling down.
Except, this tink sound happens whenever you shift into either forward or reverse, and sometimes also when the automatic tarnsmission shifts from one gear to the next.
It apparently is caused when the aluminumm driveshaft "winds up" a bit under sudden load, and then springs back against the u-joints. My mechanic correctly identified it as problem, but had throught it was failing u-joints, because apparently failing u-joints cause exactly that same sound.
The similarity in sound is probably because the same thing is in effect happening for 2 different causes. In one case, slack in worn u-joints being taken up suddenly and in the other the driveshaft unwinding against the u-joints.
On my SSR, it is easily loud to hear even with the top up, as long as the radio is off, but is apaprentyl even louder on the exterior.
Jim G