Replacement Rotary Cutter gearbox, 40hp rated, 1-3/8" - 6 spline input shaft, 1.57" X 12 tapered spline output shaft and 1:1.47 speed up ratio for Fred Cain cutters. Fits Fred Cain  Agri Series AC-104, AC-105 and AC-106 cutters .  These gearboxes have a square housing configuration and are identical in mounting and ratio to the round configuration gearboxes. These gearboxes have been used by WAC, HawkLine, Behlen, International Machinery, Tarter Gate, Midwest Mfg, Servis Rhino, Frontier, Land Pride, Taylor Pittsburg and many more. If your gearbox has a 12 spline output shaft and a 1-3/8 - 6 spline input shaft this gearbox will work. Bolt pattern is 4-3/4" on center hole to hole and 6-3/4" center to center of bolt hole on diagonal. The mounting holes form a square bolt pattern.
*****Please note this gearbox is shipped dry and will require 16 ounces of 80 weight gear oil or heavier!*****