12 Bolt Truck Eaton Posi - 373 up ratios - 1963-1982 12 Bolt Truck Eaton Posi - 373 up ratios - 1963-1982
12 Bolt Truck Eaton Posi - 342 down ratios - 1963-1982 12 Bolt Truck Eaton Posi - 342 down ratios - 1963-1982
12 Bolt Truck True Trac - 373 up ratios - 1963-1982 12 Bolt Truck True Trac - 373 up ratios - 1963-1982