Fits MX7 and MX8 (Both Left and Right Hand Side on MX8) mowers that use a bolt to mount the blade carrier to the gearbox, will not fit mowers that use a castle nut to mount the blade carrier. 1:1.46 Speed Up Ratio (22 tooth input gear and 15 tooth output gear) High Speed Tapered Roller Bearings and Heat Treated Gears and Shafts 1-3/8" Diameter Input shaft with 21 splines, 1.97" Diameter Output Shaft with 15 tapered Splines (6) 3/4" Mounting Holes on a 8" Bolt Circle (only 4 are used the other 2 are for other applications) Center of Input Shaft to base flange is 7.06", Output Shaft length from Base Flange is 8.50" Shipped Dry Please add 80-90W gear lube before using One complete replacement gearbox compatible replacement for John Deere MX7 and MX8 Rotary Cutters. This is a direct bolt on replacement for the "Iberica Spanish" version of the gearbox with matching gear ratio (1:1.46) for the MX7 and MX8 mowers. Includes blade pan mounting bolt and washer kit. All gears and shafts are heat treated and all bearings are high speed tapered roller bearings. *Housing construction: Ductile iron *21 splines input shaft: 1-3/8 in. *Output shaft 2 in. 15 Spline *Gear type: Bevel gear *Bolt pattern: (64) 3/4" diameter holes on an 8 in. bolt circle *Gear ratio: 1:1.46 *Input Shaft center to the base flange is 7.06" *Output shaft length from the base flange is 8.5" *Shipped dry, please add 80-90W gear lube before using *Weight: 70lbs