You're right, you're no expert on this, sorry. The RPM has nothing to do with it. RPM is the same. Only difference is the actual distance traveled per revolution which is determined by the circumference of the tires. I'm not debating that you can clear the code- I'm debating the reason for the code.
Also remember that the "speed" on the speedo is calculated by the output shaft RPM and the expected tire circumfurence. Unless it's being checked by GPS, it has no idea exactly how fast you're going. In any case, that wouldn't involve 4WD errors. Those would most likely be driven by RPM differences between the front and rear wheels; not some speed discrepancy. If that were the case, why haven't we seen hundreds of people who have changed tire/wheel combos posting with this problem? Look at @zdubyadubya post earlier in the thread.
Also remember that the "speed" on the speedo is calculated by the output shaft RPM and the expected tire circumfurence. Unless it's being checked by GPS, it has no idea exactly how fast you're going. In any case, that wouldn't involve 4WD errors. Those would most likely be driven by RPM differences between the front and rear wheels; not some speed discrepancy. If that were the case, why haven't we seen hundreds of people who have changed tire/wheel combos posting with this problem? Look at @zdubyadubya post earlier in the thread.
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