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Do most 2000 A4 z28's have 2.73 gears or 3.23?

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Old 07-14-2009, 03:22 PM
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Default Do most 2000 A4 z28's have 2.73 gears or 3.23?
I am going to buying my aunt's 2000 Z28, but i want to know what gears it has?

Thanks in advance.
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Old 07-14-2009, 03:29 PM
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Assuming it's stock, look at the RPO codes on the drivers side door:

GU2 - 2.73
GU5 - 3.23

2.73 came with steel driveshaft, 3.23 aluminum driveshaft. If it has 2.73's don't let that stop you from buying it.
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Old 07-14-2009, 03:35 PM
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My 2002 has the 2.73
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Old 07-14-2009, 04:29 PM
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My 99 has 2.73's.
Getting a 12 bolt with 3.73's from Speed Inc in spring!
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Old 07-14-2009, 05:05 PM
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Originally Posted by 2001NBMZ28
Assuming it's stock, look at the RPO codes on the drivers side door:

GU2 - 2.73
GU5 - 3.23

2.73 came with steel driveshaft, 3.23 aluminum driveshaft. If it has 2.73's don't let that stop you from buying it.
i had 3.23's and a steel drive shaft. so some are available without
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Old 07-14-2009, 05:23 PM
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My 2000 has 2.73s, good for gas mileage
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Old 07-14-2009, 05:24 PM
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Yes, 2.73 was the "standard" gear for A4 Z/28s so the majority got that.
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Old 07-14-2009, 05:25 PM
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My 2K had 2.73s but it didn't last long.
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Old 07-14-2009, 05:25 PM
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I have the 3.23 (GU5) -- how can you tell if it is steel or aluminum? I thought mine was aluminum.

Also, G80 -- posi rear
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Old 07-14-2009, 05:26 PM
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Originally Posted by TheVandMan
I have the 3.23 (GU5) -- how can you tell if it is steel or aluminum? I thought mine was aluminum.

Also, G80 -- posi rear
Look from under the car.
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Old 07-14-2009, 05:27 PM
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Originally Posted by bene
Look from under the car.
lol I know...I was just thinking maybe a code for it..
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Old 07-15-2009, 04:19 PM
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Most steel ones will have surface rust and look like ****.
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Old 07-18-2009, 02:08 PM
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i didnt know steel or aluminum driveshafts were an option. i guess i have to look under the car.
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Old 07-18-2009, 10:10 PM
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What's the real difference as far as the car is concerned? Aluminum lighter and steel stronger or something?
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Old 07-20-2009, 08:55 PM
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My 98 Z came with 2.73's. I went with a true posi stage 3 carrier and 3.73's
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