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Old 01-27-2004, 04:31 PM
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finding out the gear ratio of a 10 bolt.

today i opened up my read end in my 66 el camino. its a 10 bolt. not sure if its the origional one. i took this code off of the ring gear:

GM 3790628-11 37- 66

is there any way i can find out the gear ratio through these numbers?

thanks.

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Old 01-27-2004, 05:27 PM
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GM 3790628-11 37- 66
GM 3790628=part number
11 37=gear ratio 3.36 37 ring gear teeth divided by 11 pinion gear teeth.
66=year

With this information, I would say you have the original axle and gears.
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Old 01-27-2004, 09:03 PM
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cool, thank you. i looked all over the net on how to decode that, but couldn't find it.
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