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Rear axle swap

SMB58

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SMB58 New Member

SMB58

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I have a 1988 GMC C1500 that I inherited from my father and I have been restoring and fixing it up for a couple years now. I would really like to put a locker rear in it. My rear code is GU4 (3.08). I understand that the locker code would add a G80 to that. Is this correct? All I should have to do then is scour used parts dealers for a truck with G80 GU4 RPO codes and swap the whole rear? Any help would be appreciated.

Badass69 Senior Enthusiast

Badass69

Posted
Posted

If you really want 3.08 gears still you could. I would honestly just swap the carrier on your one you have now.... finding those trucks with 3.08's in the bone yard isn't going to be easy.... and a lot of them will be open. Not to mention finding a 25+ year old Gov Lock that actually still works would be a needle in a haystack. Really you could regear it too.... unless you really want the 3.08 gears for whatever reason. Is the truck a Turbo 400 or something? 3.42 even is a nice gear with a 700R4.

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