Yes, jack up a back wheel, make a chalk mark on the tire, and one on the driveshaft. Lay down where you can turn the wheel, and see your mark on the driveshaft at the same time. Slowly rotate the wheel, watching your driveshaft. You can then count the number of times the driveshaft has to rotate to make one revolution of the wheel. That will be your ratio. It won't be exact, but you should be able to get a rough idea, e.g. 4.33 Four complete driveshaft rotations and a portion of the fifth.
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91 tracker 5 spd. 8V 1.6 L 4X4 hard top. 122,XXX miles.
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