Glad my abuse test can serve as an adequate testimonial. You're quite welcome.
The presence of the G80 is almost irrelevant since you would never get the RPM difference required for a lock-up. The G80 *does* contain clutch plates that will see increased friction if there's a tire size difference. But in the oil bath they're in, I doubt it would amount to anything. I'll have to look at its construction more to see if they would notice a few RPM difference for an hour or two or running.
A difference in tire size on the front might be enough to trip the ABS fault monitor, or the same thing on a new style rear with the 4-channel ABS controller. Hmmmmmm. I don't think I have enough data yet to recommend either axle over the other. I'm so conflicted.