GX470 Bang/Jerk at idle. Can this be the infamous driveshaft issue?

[Ambgx470]

Just bought a 2008 gx470 and started experiencing what I think is the clunk TSB issue. (Have read the sticky). My question is: Why would it be the drive shaft, if jerk/bang is felt when the vehicle is stopped/ideling at a traffic light? I can understand if the vehicle was about to be set in motion. Can someone explain? 

[RX400h]

At least one person claims to fix the issue by cleaning and lubricating the drive shaft splines.

The Car wizard has some good advice and shows the undercarriage of a Toyota version (maybe not your issue but good advice, nonetheless)

 

Another person replies with this statement:

Quote

Best thing you can do is replace the driveshaft with the new part number which was designed for this fix. There is a TSB on it. Shaft is rather inexpensive, about $350 shipped.