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Old 10-04-2012, 04:26 AM
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Those are Casting Numbers & Dates. They wont tell you the gear ratio.
It looks like a 9" inch Ford to me.
For ratio Info, you'll have to count the Pinion & Ring gear teeth & divide Ring by Pinion teeth #.
Can also rotate the tires 1 revolution & count the Driveshaft revolutions if Posi Diff. If Open Diff rotate 1 tire 2 revolutions & count DS revs.
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