Replacement Rotary Cutter gearbox for WAC "The International Line" IM502-75, IM602-75 and Super 11.  These gearboxes can have a square or round housing configuration and are OEM gearboxes featuring a 1:1.46 speed up ratio, 4 bolt mounting with holes 8" on center, a 1-3/8" X 6 spline input shaft and a 1.97" X 15 tapered spline output shaft. The center line of the input shaft is 7-3/16" above the bottom of the gearbox mounting flange. There is a gearbox mounting bolt hole directly under the input shaft and each hole is 90 degrees apart. The gear ratio of these gearboxes correctly match the original boxes on your mower. This is a heavy gearbox weighing in at 90 lbs.
Note***:
If using this gearbox on a Super 11 Rotary Cutter please make sure your old gearbox has the 1-3/8" X 6 spline input shaft, some units were equipped with a 1-3/4" X 20 spline input shaft.