you need to buy a 81mm Bottle Brush hone.. you can only get them from a few places... about 45 shipped.. Puts a better than factory cross hatch in the cyl... soak the cyl in Trans fluid and the hone.. and then just go up and down the cyl till you see the nice and smooth cross hatch pattern...
then you measure with a dial bore gauge and see if it's stil within spec... it most always is since your just polishing the bore ...Just never use a Stone hone say from craftsman, shitty hone and it will take metal off of your cyl wall