anybody take a guess what my rear end gears might be? - Hot Rod Forum : Hotrodders Bulletin Board
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Old 04-20-2004, 11:11 PM
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anybody take a guess what my rear end gears might be?

since im too lazy at the moment to take my diff cover off and refill the oil, could you guys take a stab at what ratio you think my rear end gears are? its an S10 with a souped 283 small block, turbo 350 tranny with a stage 2 shift kit, running on 265/50/16 tires in the back. currently i am doing about 2200 RPM at 100km/h (about 60mph i think). i was told they were 3.42's but ive been told that they sound like 3.08's or something higher. anybody have an opinion on what they think they are?? thanks alot

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Old 04-20-2004, 11:57 PM
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You can measure the ratio without tearing into the rear end.

http://hotrodders.com/showthread.php...end+gear+ratio
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Old 04-21-2004, 08:35 AM
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Is it a stock S-10 10 bolt. If so it will have codes on it indicating your gear ratio.
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Old 04-21-2004, 12:39 PM
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yes it is a stock s10 10 bolt. where would the codes be? if its the ones in the glovebox then theyre kinda useless because i know the rear end has been grenaded on this truck in the past and who knows what ratio they may have replaced it with. is there some on the outside of the rear end?
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Old 04-21-2004, 10:05 PM
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there should be a tab on one of the bolts on the differential that tells you the ratio, that is if no one has messed with it.
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Old 04-22-2004, 08:16 AM
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The codes should be on the passenger side, facing forward, right next to the center section. You'll need soap stone or chalk to rub across the axle housing (I hope that's the correct term). You'll get about 5 letters/numbers.

Let me know what they are.


Mike
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Old 04-22-2004, 11:29 AM
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It will be on the passenger side axle housing just inside the leaf spring perch on the front side.


GU2 2:73 ratio

GU4 3:08 ratio

GU5 3:23 ratio

GU6 3:42 ratio

GT4 3:73 ratio

GT5 4:10 ratio

GQ1 Open Differential Rear Axle

G80 Positraction/Locking Rear Axle
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Old 04-22-2004, 11:46 AM
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Why not just jack up the rear wheels and count some turns? Would save a lot of computer bits!
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