Esenpro Drop-in or 1:1 replacement gearbox is designed to match all critical dimensions of your existing gearbox with precision. This includes the footprint, shaft center distance (from the center of the input shaft to the center of the output shaft), center height (from the base to the center of the shafts), as well as the input and output shaft lengths and diameters. We guarantee that you can remove your existing gearbox and seamlessly slide in our replacement with absolutely