Galloping Geargrinder, or the Old Model T (as referred to by John Lasseter), is an old train who works on the Ornament Valley Railroad. In Cars 2, Geargrinder scares Lightning McQueen and Mater away when they are playing on the Ornament Valley train tracks.
He is a 1935 Rio Grande Galloping Goose with a black paint job and a front cowcatcher covering his chassis. He has six small wheels, a lantern on his side, and a small gate protecting cargo on his back.
"The Galloping Geargrinder has been riding the rails of Carburetor County since the 1930s. The Geargrinder was light on the tracks and extra efficient at running the mail into little towns like Radiator Springs. But by the 1950s, the delivery work dried up as the semitrucks began using the new straight-line highway that bypassed the old, curving train route. Other Geargrinders ended up at amusement parks and tourist traps, but old GG prefers to continue chugging along his original line - and to keep Mater from trespassing in the tunnels!"
- Galloping Geargrinder's design is very similar to that of Lizzie's, leading to some fans' confusion prior to the release of Cars 2.