well we're about to turn 91k, and the noie has gotten a bit louder... but the truck still drives normally. Maybe a bit of bucking in drive, but it's so marginal, hardly noticeable, could just be the roads. Now that it's gotten a little louder, I can really confirm that the noise does totally go away when you let off of the fuel with the convertor locked up.
I guess this rules out wheel bearings?? Trans. is only 30~k old on rebuild (never have had to actually have the fluid changed.. it's gone thru so many trans.)
Maybe i can try to find some really smooth road, and coast down a hill with the truck off and hope I can pick up the noise. It's audible to me, but i dunno how well a camera would pick it up.
It does not sound like a early 99 torque converter at idle with the rattle.