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Old Dec 10, 2010 | 02:23 PM
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Default Rear end

how can you tell what rear end gear ratio is installed from factory.
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Old Dec 10, 2010 | 09:00 PM
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RPO codes in the glovebox.

3.42 ALL manual Trannys

2.73 standard for autos

3.15 performance rear end for autos

GU2 Axle, Rear, 2.73 Ratio
GU6 Axle, Rear, 3.42 Ratio
G90 Axle, Rear, 3.15 Ratio
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Old Dec 10, 2010 | 09:44 PM
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Originally Posted by Vega$Vette
RPO codes in the glovebox.

3.42 ALL manual Trannys

2.73 standard for autos

3.15 performance rear end for autos

GU2 Axle, Rear, 2.73 Ratio
GU6 Axle, Rear, 3.42 Ratio
G90 Axle, Rear, 3.15 Ratio
The performance axle option for the A4 will also show a G92 RPO code.
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Old Dec 10, 2010 | 11:00 PM
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Isn't it great driving cars in the modern age with tags and identification codes?

I remember crawling through junk yards looking for differential tags for the ratio or the worst case having to spin the drive shaft and try to come close to counting how many times the rear wheels went around looking for a GM 12 bolt with 4.11 in it....

Ahhh, the good ole days.
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Old Dec 13, 2010 | 09:04 AM
  #5  
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Thanks for the info!!
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