I used to know a site where you could email your vin number, year make and model of your jeep and they would email you back with the original gear ratio, diffs and all of your factory built specs. Does anyone know this site????
Be careful providing personal information. If your VIN is tied to your name and address I you might make it very easy for bad people out there on the net. Not to be paranoid, but you don't ever want someone to be able to do a reverse-lookup of you or your family by VIN (or license plate).