Gear ratio question.

[wilkin250r]

You're spinning one tire, and the other tire is stationary, right? Is it still on the ground?

It's understandable that you're confused, you're only getting half your answer. With the way the differential works, you need to spin your tire TWICE and count the driveshaft rotations.

Because your other wheel is stationary, your ring gear is only turning half the rotations that the tire is, which means the driveshaft is also spinning half as many rotations as it should. If your turning the tire once and you get almost two rotations of the driveshaft, it sounds like you may have a 3.73