I am now on my 3rd driveshaft and 2nd PTO of the summer. My driveshafts keep stripping out on the engine side of my sportster , I keep it greased but the rubber bumper keeps getting shredded while it wears on the inside Of the shaft the same way, but the impeller end is like new on all of the shafts. I took it into a shop and they said it was aligned but looking through the hull it looks like the motor is sitting high. Any help is appreciated