The TSB number on my service record says "Reburn ECM PER TSIB TC006-04"
I have no idea of the accuracy of these numbers nor what they mean......only what is reflected on my service record.
I returned to the dealer for the Navigation "fix" on 12/28/04. When setting up the appointment, I asked the service rep to check for a new "fix" for the transmission. His reply was "we know of no fix available". I referred him to postings on this website.
Miraculously, when I arrived the appointment a week later, the technician said "we also have a fix for your transmission." Interesting. ;)
Results: I have been pleased to date. I have been one of the chronic complainers of this electronic throttle malady, and I don't wish to get prematurely enthusiastic about the fix. So far, however, I have noted a vast improvement in the smoothness at lower speeds, and I have tried to put the vehicle in circumstances which caused the jerkiness.
The "reburn ECM" language on the service record reminded me of what was attempted six or seven months ago..........after driving my vehicle, the technician said he would "reset" the computer........whatever that meant. I only hope that a "reburn" is not the same as a "resetting". We'll see. Maybe Lexus DOES indeed listen to owners and read these postings.