Dodge Torque-Arm II Speed Reducer, Heavy Duty Single and Double Reduction, 15:1 Gear Ratio, 7.5 hp, Solid Shaft Input, Twin Tapered Bushed Bore Output, 1.125 in Dia x 3.94 in L Input, 2-3/16 in Output, 1874 rpm Maximum, Oil Lubrication, Shaft Mounting, Cast Iron, Gray, 12.61 in L x 7.81 in W x 15.08 in H Dimensions