Transmissions and Drivetrain Need help with your trans? Problems with your axle?

Axel codes and ratios?

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Old 02-16-2002, 12:19 PM
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Axel codes and ratios?

What ratio does code "G 92" stand for? This means "performance ratio", whatever one that is. Thanks. Also, what does "G80" stand for. Posi-traction?Thanks in advance!!
Old 02-16-2002, 07:33 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
G80 = Limited Slip Differential (posi)

G92 was used for a few different things over the years but most of the time GM used it for gear ratios of 3.08

You should have a RPO code for the specific ratio.
Old 02-26-2002, 09:41 AM
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rear gears RPOs

3.45 ratio = GM3
3.08 ratio = GU4
3.42 ratio = GU6
3.27 ratio = GW6
Limited Slip = G80
Performance ratio code = G92
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