Replacement of 8.75 axle

Yes I believe its a suregrip. I didn't rotate the driveshaft and I lined up the axle the same way I took it out. If I rotate the axle using the other side until both inner and outer pieces line up Ill try to slide it in.

Thank you and Ill let you know if it works

BUT, when you tried to re-install it, you may have gotten it into the first spline, and it may have turned just enough to mis-align them.