Originally Posted by
Casper
Not totally true. You need to take into account the pinion to ring gear at the front and rear diffs. I don't know what ratio that is though!
Transmission Gear Ratio
This is the final ratio of the whole transmission from input shaft to output shaft, which includes all the internal gears. The result should be a number larger than 1.
If your vehicle does not use a transmission, enter 1 here. If your vehicle uses a center differential, this ratio will be part of the spur/pinion ratio and you should enter 1 here.
Open the dropdown list to select some popular preset values. This will automatically fill in the correct value for that transmission.