Crane end shake
The check above is for a warped yoke or bent ejector rod, not end shake in the yoke.
This can usually be detected with the cylinder in place, but is surer without the cylinder. Close the crane and while it is closed look for some play in the crane in the fore and aft direction. It should be almost non-existent. End shake or play in the cylinder itself should be 0.0005 minimum, 0.001 nominal, and 0.002 maximum. The crane should have less. With the cylinder in place, see if you can increase the apparent cylinder gap by pushing the crane, not the cylinder, to the rear. I've only seen one N frame S&W with this problem, so it's probably not common. (I'm getting sloppy, it's a yoke on a S&W and a crane on a Colt.)