How to find readend gear ratio on housing of GM S-10 10 bolt. - Hot Rod Forum : Hotrodders Bulletin Board
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Old 01-26-2008, 03:09 PM
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How to find readend gear ratio on housing of GM S-10 10 bolt.

I have recorded these numbers & letters off the housing! Around outside perimeter: GM 18 K In middle of drivers side housing: J 29 2 Under that 26027171 N Somebody told me that it is a 3.42 ratio Posi-Traction! Anybody know for sure????????

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Old 01-27-2008, 09:11 AM
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the numbers should be on the gears, not the housing. afaik anyway.

to get a real close #. i mark the pinion and axle/tire. then turn the pinion and count how many times it goes around, to make 1 turn on the axle/tire.
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Old 01-27-2008, 09:51 AM
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I have 2 S10s and both have 3.42 gears. If you call the dealership with your VIN# they will tell you what the truck came with.
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Old 01-27-2008, 10:09 AM
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This was the only thing worth mentioning from Google. I didn't look through all 6 pages, but the first post has a few listed.

Russ
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