Hey Guys,
Thanks for reading and responding. Still on ignore by Toyota, only had time to leave 3 messages this week for the gentleman handling my case. I was able to determine the SAE (Society of Automotive Engineers) Standard for Speedometer and Odometer Accuracy. Now this is an industry standard, but is not a law. The standard is J2976-201602. The "-201602" just means that it was last revised in February of 2016. The accuracy that the SAE standard calls for is:
Speedometer - .99 to 1.04 So 1% on the low side and 4% on the high side.
Odometer - +/- 2.5%
I have not proven the odometer to be off, we only monitored the speedometer on the chassis dyno. As for those with speedometers that are off, normally it is off by a percentage, not a specific MPH.
Hopefully this information helps others dealing with the same issue.
Thanks,
Wes