Too much endplay question.

Your crank end play is determined by the clearance between the thrust bearing and the clearance in the part of the crank that goes in the thrust bearing. Either the bearing portion is too small or the crank portion is too big. Too much endplay may hammer and or destroy your converter eventually.

When it eventually fails, your car will be stuck on the side of the road. Your will have to call a tow truck, or walk home...