I listened to the noise in Doug's truck, and your video (thanks - very cool!) replicated it pretty well. It was that clatter-clatter-clatter you hear when you put in the clutch under certain turning conditions. To me, it didn't sound damaging, beyond normal 'cruiser sounds.
Steve H. - KE0KNH
Colo Springs, CO
'78 FJ40, '89 FJ62, '98 4Runner