Some 4.56 gear questions!!

I put a dab of spit on the top of the tire,then some more spit on the quarter panel in line with the spit on the tire.I turn the tire slowly and count 1/2 revolutions of the rear yoke until the marks line up again.1/2 1. 1/2 2 1/2 3 etc.This crude method should get ya real close.