rear axle code

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randomTruckKid

randomTruckKid

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trying to figure out what ratio my axle is.
i cant find anything giving me information on this stamp. its a 79 c10, big 10

Kdx 244w91
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TotalyHucked

TotalyHucked

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@Keith Seymore could probably help. Does your truck still have the SPID? If Keith says the axle numbers don't give you that info and you don't have the spid, you can always jack the back of the truck up (chocking the front wheels of course), put the truck in neutral and count how many times the driveshaft turns in relation to one tire rotation. I.E. 3 3/4 turns is a 3.73, 2 1/2 turns would be a 2.41, etc.
 
randomTruckKid

randomTruckKid

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TotalyHucked said:
@Keith Seymore could probably help. Does your truck still have the SPID? If Keith says the axle numbers don't give you that info and you don't have the spid, you can always jack the back of the truck up (chocking the front wheels of course), put the truck in neutral and count how many times the driveshaft turns in relation to one tire rotation. I.E. 3 3/4 turns is a 3.73, 2 1/2 turns would be a 2.41, etc.
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i dont have it :(
it was ripped off the glove box.
i might just have to do that.
 
randomTruckKid

randomTruckKid

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Ok I counted 4 I couldn't see what the . Was since I was pushing the truck.
 
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mran613

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Hi,

The rear end gears on my truck were changed before I bought it. Can anyone decode this and tell me which stock gears my truck came with?

Thank you
 

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mran613

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Keith,

Thank you! I just dropped a new ATK 350 in it that has 350 HP and 400ft/lbs torque. The truck isn't as "quick" as I thought it would be so I did some investigating and found a sticker saying the original gears were changed. I have to figure out what's in there now and then what ratio to go with.
 
SquareRoot

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Pull the cover and look. It needs an oil change anyway.
 
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