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It says it controls the brake and accelerator so you can concentrate on steering, but about the transmission, only this:"This capability helps you concentrate on steering since you dont have to apply the brakes or downshift the transmission. " Why not? Disk brakes may not overheat like drum brakes do, but why rely on them entirely when you can downshift. Now they are saying basically NOT to downshift. If the auto system fails, you'll be happy you downshifted, and even if it doesn't.