i am changing the axle seals, and axle bushings on a cub original. the problem i have is that i have a little bit of play in the axle in and out. if you put a jack under it you can push and pull the axle about 1/16"(just guessing).is there a way to fix this problem, or is a little bit of play normal. i looked up the parts breakdown and there are diff. bearing retainer shims. is this what i need to take out the play, and if so, how do i measure which shim i need? they are expensive ($20 each) so i would like to only do this one time and do it right. thanks