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depends most chevys came stock with 2.89:1 ratio in the dif. however the easiest way to find out exactely what our vehicle has is to remove the dif cover plate and count the teeth on the ring gear, write that down, count the teeth on the pinion gear write that down and then divid the ring gear by the pinion gear.

it is called "driven divided by drive" an example if your ring gear had 37 teeth and your pinion gear had 9 teeth, it would be 37/9 which is 4.11, so you would have a 4.11:1 gear ratio in your dif.

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