Originally Posted by ggevaert
The instructions don't say anything about doubling the number you come up with (which would then make more sense)
Doubling is EXACTLY what you need to do for a non-posi axle. Since you're only spinning one wheel, you're losing 2:1 in the spider gears. Now your 2 2/3 looks a lot like 2.73:1. By the way, I usually turn the drive shaft ten times. It's a lot easier to see the difference between 32.3 and 34.2 turns of the wheel than 3.23 and 3.42, for example.