Gear ratio is simply the number of rotations of the driveshaft divided by the number of rotations of the axleshaft. I would simply jack the back end up, rotate the wheels through one rotation while counting the number of rotations of the driveshaft.
gear ratios
Is there an easy way to get the rear end gear ratio of my 1985 chevy truck. I am missing my information tag from the glove box.
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