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Old 07-26-2010, 12:16 PM
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cobalt327 cobalt327 is offline
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Quote:
Originally Posted by budgetbuilder
Are these codes located on the rear end itself, or where would I find them? Thanks!
I think the above codes DV posted are on the front-facing axle tube, right side.

You can also use the RPO sticker from inside the console, hatch or glovebox to determine what came in it, ratio-wise. The sticker looks like:



Of course, this doesn't mean that is what is now in it. Dropping the cover is the surest way to know.

Some RPO codes from HERE:

41 : 15 = 2.73 (RPO GU2)
41 : 14 = 2.93 (RPO GU3)
40 : 13 = 3.08 (RPO GU4)
42 : 13 = 3.23 (RPO GU5) / Approx. RPM’s at 70 mph--2133
41 : 12 = 3.42 (RPO GU6) / Approx. RPM’s at 70 mph--2255
41 : 11 = 3.73 (RPO GT4) / Approx. RPM’s at 70 mph--2463
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