40hp gearbox with 1-3/8" X 6 Spline Input shaft and 1.57" X 12 Spline output shaft

Replacement Rotary Cutter gearbox, 40/45hp rated, 1-3/8" - 6 spline input shaft, 1.57" X 12 tapered spline output shaft and 1:1.47 speed up ratio for most rotary cutters with slip clutch PTO drivelines.. Fits Fred Cain, WAC, Big Bee, New Holland, John Deere, Kubota, Land Pride, Rhino, Bush Hog and many more brands.  These gearboxes can have a square, round or 5 Sided housing and all are interchangeable with the same mounting patters, gear ratio, and shaft dimensions.  If your gearbox has a 1.57" diameter by 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.