Replacement Rotary Cutter gearbox, 75 HP rated with 1-3/8" diameter input shaft with 6 splines, a 1.977" X 15 tapered spline output shaft and 1:1.46 speed up ratio perfect for 5' , 6' and 7' rotary cutters. These gearbox have mounting holes 8" on center in a diamond shaped mounting pattern with one hole being directly under the input shaft and each additional hole 90 degrees apart. The gearbox includes the castle nut and cotter pin. *****Please note this gearbox is shipped dry and will require gear lube to be added before use! We recommend a good grade synthetic oil is the 80-140 weight range***** We sell many replacement parts for the Land Pride rotary cutters. If you don't see the parts you need listed please contact us we would love to earn your business. We are listing new items frequently so please check our store often. Part Number:89751 We stock a wide variety of replacement parts for Agricultural Equipment please contact us if you have any questions or if you would like more information.