[40 Deluxe]

Unlikely for axle gears to wear that much in normal cornering. A teenager on a gravel road, on the other hand, leads to much spinning of one rear wheel, thus much gear wear! Or maybe it was a farm car. In the early '50's, my uncle used a Model A to power a grain elevator. He had an adapter welded to one rear wheel to couple it to the elevator. He'd jack up that wheel , put the A in low gear and it'd idle all day elevating oats or corn into the granary.