Tim Allen is shifting gears by bringing in another stand-up comedian to help generate some laughs on his ABC sitcom. Jay Leno will make a cameo as himself in episode 109 of Shifting Gears ...

But there's a big exception right now. In Tim Allen's new comedy "Shifting Gears," his character Matt Parker operates a classic car restoration business. "I didn't do it this way in my head.

Leno is one of a handful of high-profile guest stars appearing in the first season of Shifting Gears, joining Jenna ... using a vintage 1941 fire truck.