At 55k, My '00 GS has it's first major problem. Seems to be coming from the transmission. http://www.youtube.com/watch?v=CShKkyGnLGY
The noise disappears soon as the clutch is pulled in. Rolling in neutral with clutch out reving the motor will not make the grinding sound worse. Sounds a little rocky in neutral ,but soon as it's under a slight load all hell brakes loose with a nasty rhythmic rumble/grinding sound. Trans shifts perfect. Oil is new & full. Sounds too bad to be the push rod bearing.
Anyone had a similar experience with a oil head 6 speed? I'm tearing into it to check the driveshaft first . Let you all know what I find.