I don't think so. Here is a video of the output shaft running alone. My son helped me and sat in the seat, turning on the PTO. I didn't even know when he turned it on, it was that smooth.
Not the best video...me with my hand-help cell phone camera. But the shiny spot on the end of the shaft sits pretty solid, so I am thinking the shaft is running straight.
The shaft is a poor design. It is essentially the splined output shaft with a gear on the other end. The gear is supported on either side by ball bearings. But they are really only the thickness of the gear (1/2 in or so) apart. So those two bearings have to support the shaft, and all the weight/vibration it carries. With that little lateral separation between the bearings, the "support reactions" as they are called is incredibly high. I am surprised the aluminum transmission cover itself did not fail.
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