I can't classify the lash as 'excessive' yet. Just that there is lash, which is expected as this is not an interference fit (hand assembled in the field) and new shaft/gear connections exceed the manufacturer's lash specification using their proscribed measurement techniques (again, intended...
I've got existing spline connections which I am told have excessive lash. What I can't seem to figure out is if lash is somehow included in the DIN standard through tooth thickness and so on, or if the final fit is up to the original engineer to determine and specify through those same DIN...