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Discussion Starter #1
Need to find the factory ring/pinion ratio I cant see the pinion due to the support bearing and a factory locker of some sort (brand unk) anyway the code stamped intot he ring gear is 2GM 3977384 10 41 6 79 I know the 3977384 indicates the axle ( at least I believe it does) but what about the rest?
Is it a 4:10? :confused:
 

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Discussion Starter #3
Thanks, I was looking for the ratio to be indicated with the ring gear number first. Thanks again
 

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FA1 4.88/6.94 Rear 2-speed
FA2 4.88/6.94 Rear 2-speed

what is this? its on that list that gotlabs linked, but i have never seen a 2spd rear end.
 

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Nice math 41 ring gear teeth divided by 10 pinion teeth would make it a 4.10 not a 4.11 correct?
 
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