Worn out yolk?

I think I will order a new yoke just to be sure . There is enough play in the yoke that I can see it . I will also pack the yoke with moly .. thanks AJ
How much yoke tube is not inside the tailshaft seal?
More than 1 inch or so can let a yoke with worn splines move off center.

There should be literally zero side to side or up and down movement that you can feel by hand.