I have the exact same germlin!!! I finally got the tech guy to acknowledge that he heard the sound too. He said he was even able to duplicate the knocking or rattling noise on the Operation Manager's IS 300.
"Ok, so what are you guys going to do about it?" He said basically there's nothing they can do since I already had the ECU re-program/update. He offered to do the TRAC update but specified that this update was not intended to deal with the rattling noise I was experiencing, therefore, he wasn't sure if it would fix the problem. Another possible downside to getting the TRAC update is that the car might be a little more sluggish off the line since the TRAC update is designed to smooth out the gear changes (transmission).
I was afraid to get the TRAC update since there's no telling what the outcome would be and I couldn't change it back to the way it was if I didn't like it.
While the knocking/rattling doesn't seem to effect the performance all that much it is extremely annoying as hell! If anyone out there knows how to solve this problem please let me know.
"Ok, so what are you guys going to do about it?" He said basically there's nothing they can do since I already had the ECU re-program/update. He offered to do the TRAC update but specified that this update was not intended to deal with the rattling noise I was experiencing, therefore, he wasn't sure if it would fix the problem. Another possible downside to getting the TRAC update is that the car might be a little more sluggish off the line since the TRAC update is designed to smooth out the gear changes (transmission).
I was afraid to get the TRAC update since there's no telling what the outcome would be and I couldn't change it back to the way it was if I didn't like it.
While the knocking/rattling doesn't seem to effect the performance all that much it is extremely annoying as hell! If anyone out there knows how to solve this problem please let me know.
