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Old 06-29-2003, 03:30 PM
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Question gm 10 bolt id numbers

id like to know what gears i have. i pulled the cover and found these numbers on the outside of the ring gear. 2 gm 3984825 5 41 10 71. i looked through some old posts but didnt notice any that gave an explanation for the numbers. thanks for any help........47dawg

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Old 07-01-2003, 08:01 PM
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Wouldn't that be a 4.11 gear set?
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Old 10-17-2003, 05:39 PM
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ratios

If you still have the cover off you can count the teeth of each gear. Put a mark, not a scratch or any thing that will ruin bearings, and once you have the numbers the formula is easy.

Driven gear divided by the Drive gear
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