What rear axle do I have?

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EGaskamp

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I've looked in the glove box, and found the sticker with the code on it, however there are about 30 3 digit codes on there and they are not labeled as to what they are! How do I know which one is for what axle I have? It's a '93 K1500 Blazer, and I'm mainly wondering if my truck has a limited slip rear diff. If not, how hard would it be to add LS to these diffs? Thanks!
 

EGaskamp

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Ok, after taking a look at the codes I was able to determine mine is G80. This is the factory locking diff, and not posi, correct? What gear ratio is this?

Eric
 
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