It should, my tundra did, and this new gen3 taco 6 speed will downshift at certain speeds when decelerating. The transmission has to sense being in the correct gear for that speed if needed to accelerate again, otherwise your engine will bog, or feel like its lugging.should it not downshift change gears AUTOMATICALLY as the speed decreases to this level?
my experience is with MT ONLY for more than 3 decades so IDK! ??!!