Mike-

I took the measurement at the center of the tires. I jacked up the front end.. spun the wheels and marked a line so I could use the same reference front and back of the tire..

Thanks for the info on adjusting the box, I definitely did not loosen the 4 bolts before adjusting the eccentric. My box has a small plate on the back with a slot that has a jam nut, I loosened the jam nut and slid the plate which seemed to change the back lash in the gears. However, I slid it to the end and still have some movement...

Im thinking I will have to take another look at these adjustments..

Thanks again