Leftcoast, if you want a rough idea on what gears you have, you can jack up the rearend of the car so both tires are off the ground, block your front wheels so it doesn't get away from you. Rotate your rear tire one complete revolution and count how many times your driveshaft spun around. If the driveshaft spun around 2 3/4, then you have roughly 2.73 gears. If it spun roughly a little over 4 times then you have 4.10 gears and so forth. Again, this just puts you in the ball park. If you can't find or decipher any codes and you want exact, then you have to pop the rear cover and count the number of teeth on the ring gear (the big one) and divide it by the number on the pinion gear (the small one). Hope that helps.