my cub has some up and down play from the steering arm which attaches to the bottom of the box, i tightened the nut, got 1 castle and it was tight, but the play is still there, about 1/4 inch to 3/8ths up and down movement, i adjusted the toe in today too, as it measured about 1/2 inch of toe out, i got it to 1/8th inch toe in now, the reason for all this is after i got done mowing 15 acres the other day i put her in 3rd gear and took off,once i got it running in 3rd gear about 3/4 throttle, the front wheels went to flapping like a butterfly , now this cub never did this before,the manual showed a thrust washer on top of the steering arm, which im assuming is worn, and thats where the slack is coming from, but i have looked here and on stiener tractor parts and nobody is showing a thrust washer, so, does anybody know where to get one or just what its deminsions are? im assuming its brass, or any other ideas?