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I can’t figure out what my gear ratio is. I’d like to know how much my truck will/won’t haul. Rather than the normal door jam/glove box sticker showing the RPO codes or Service Parts ID code, my truck has a QR code. A QR reader app gave me the following codes:
Please help. Thanks.
I'm not sure that's the right way to put it, but something I can't figure out . . .
If you have a sticker that shows RPO codes 11 columns wide & 8 rows deep, is, say, position Col.3 + Row 4 always the code for the same feature ?
Or are they just randomly listed.
If it's just random, and you wanted to find, say, the axle ratio code, then you'd have an RPO lookup chart, and you'd have to, one by one, go through say 88 codes on the sticker, until you found the one that is the same as an axle ratio code - which would be kind of tedious.
But if I knew that the axle ratio code was always in position, say, Col.3 + Row 4 it would be a lot easier.
Follow my drift ?
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.
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