Shifting Gears wouldn't be the hit that it is without Tim Allen's feedback - but what feedback has the lead had about the show? Showrunner Michelle Nader exclusively told Us Weekly about collaborating with Allen, 72, sharing earlier this month, "It's a sense of authenticity to his character and who Tim is too. We're very different, obviously. And we come at it from male and female perspectives." Nader noted that Allen has helped shape the story. "Believe me, we go back and [forth] with him and I.