[War_Wagon]

It probably doesn't match up because you have aftermarket wheels and tires that aren't factory sized. If you are trying to figure out your gear ratio based on RPM and speed in a certain gear, and comparing that to factory specs, you need to be using a tire with the diameter of the factory equipped tire. If you measure the diameter of your tire, compare it to the diameter of the factory equipped size, then use that difference as the percentage of correction for your results, you will have a better chance of figuring out what gear ratio you have.