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 for Land Pride cutters. Fits Land Pride models RC2560, RC2572, RC35120 and RC45180.. These gearbox have mounting holes 8" on center in a diamond shaped mounting patter 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:826-035C 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.