Replacement finish mower gearbox for Caroni Finish Mowers.Will fit models TC480, TC590, TC710. Gearbox is a 1:2.833 SU Ratio with 1-3/8" 6 spline input shaft and 40 mm output shaft with keyway. (NOTE: Box does NOT come with the keyway and bolt) Why spend high dollar for OEM, when you can replace with an aftermarket gearbox of the same quality?