Axle ratio

The tires rotate in opposite directions. I turned the tire 10 times and the drive shaft turned 13.8 times

Am I doing something wrong. Or can it be the differential is not as stock as I think it is
I am kind of taking a guesstimate and could the axle ratio be 2.75

I read that one tooth will change the mph by 2-3 mph. I have ordered a 32 tooth to replace my 29 tooth pinion. Will let you know