I have installed a Bx3 drive on a 1990 boat. The U-joint bearly slips in. Today I pulled it off and noticed scratches on the aluminum belows retaining ring. But the U-joint is further in when it is fully installed. Can anyone suggest how the ring has gotten chewed up?https://cimg8.ibsrv.net/gimg/www.off...809dfc7e6.jpeghttps://cimg9.ibsrv.net/gimg/www.off...b1bcaf01c.jpeg
https://cimg0.ibsrv.net/gimg/www.off...382378dcb.jpeg