I recently remembered hanging out with my uncle back when I was a kid. He had a big, old Chevy delivery truck that had a 2-speed differential. I thought, wouldn't that be cool to put in smaller trucks so you can choose rear-end gearing for hauling or highway use (and possible MPGs?)?
I left feedback on the Toyota.com website and got a response, pretty quickly:
"We wish to express our appreciation for your interest in our products and would like to thank you for taking the time to email us.
Due to the possibility of conflict between developments from within the Toyota organizations and ideas submitted by interested persons, it is our policy not to accept unsolicited suggestions for new products, inventions, patents or testimonials.
While we regret that we are unable to use your suggestion, we appreciate your enthusiasm and loyalty for Toyota."
So, eff your idea, Ken But, If I hear of them using 2-speed diffs in the future I'ma sue!