Mic the new shaft at both sides and in the middle of where the bushing rides, mic the bushing in the new gear at the same points and see what you get, I'm curious as we had to check a few before we found a winner, is it in fact a NEW shaft ? with the course splines or are you going with the...
Again, the shaft pictured indicates a 3 speed case. Both the vendors above are familiar with what the clearance between the bushing and shaft should be, have to check with them and see if the have a set thats within tolerance. Like 1 to 3 thousandths IIRC.
It was my experience that the bushing and shaft wore in an hour glass pattern which required a new shaft and bushing, which is hard to find by the way.