Over and Under Drive
Install the Over and Unde drives in your Cub Cadet Transmisions 20% Underdrive - 23% Overdrive include one pinion and one bowl gear. 26% Overdrive - 43% Overdrive include one pinion shaft, one outer pinion gear, and one bowl gear. Each part will tell you how many gears faster or slower it will make your gears. Video belows show what you need to do to install.
You may want the seal, clip and bearing kit part #51855
The 47% Overdrive has been discontinued.