Only thing I can figure is the side load of boxblade when I tilt it to cut swales. I’ve had a 990,4500 axle problems, 2 4520’s with axle problems, 2 4052r’s with axle problems, now a 4044r axle problems. And a 1025r front axle leak. That’s not to mention the 4&5 levers on 4052&4044 have a problem I have a ziptie on the valves themselves to keep them from in place after they broke. I do use mine for house pads,yard finals, work like that. I have a Gannon bb with hydraulic rippers. A smooth bucket and tooth bucket. I use a Harley rake some. I do this for a living