Interior of gear box replaced summer 2019, along with much other work so this baby is ready to go! This tiller served us very well cultivating fields and prepping seed beds for over 10 years with few major issues along the way. At last in our final season we had to replace the inner workings of the gear box along with a few bearings (which we typically replaced every 2-3 years of very heavy use) and a few other things we can discuss further. We ran this tiller with our 50hp tractor, though it is rated for 60hp. We were simply careful to run it at the correct RPM and our tractor never struggled nor was damaged.