Replacement Rotary Cutter gearbox fits many brands and models of skid steer rotary cutters  These gearboxes will have a square housing with 4 bolt mounting with a 1:1.93 speed up gear ratio and mounting holes 4-34" on center, a 1-3/8" smooth spline input shaft and a 1.97" X 15 tapered spline output shaft. The center line of the input shaft is 6-7/16"" above the bottom of the gearbox mounting flange. There is not a gearbox mounting bolt hole directly under the input shaft they are to the left and right of it and each hole is 90 degrees apart. The gear ratio of these gearboxes correctly match the original boxes on your mower. This gearbox features tapered roller bearings on the output shaft.