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Old 12-14-2002, 01:04 PM   #1
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stock rear gear ratio, '01 Z28

Does anyone know what the stock rear end gear ratio is on a 2001 Z28? It has the 5.7 litre motor and automatic transmission. I looked at the owner's manual (nothing there) and the original window sticker from when I bought it (no mention there either). My Z28 has NO upgrade packages. So, is it a 2.73? 3.23? or 3.42? Buehler? Buehler? Anybody?!


Thanks much gang!
Daryl
'01 Z28: K&N, FlowMaster, HyperTech
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Old 12-14-2002, 01:14 PM   #2
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A4's came with either 2.73 or 3.23. Check the RPO code on the driver's door:

GU2- 2.73

GU5- 3.23
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Old 12-14-2002, 01:19 PM   #3
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they came with 2.73s and they still run mid 13s?? damn why cant the camaro look good then id buy one
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Old 12-14-2002, 01:21 PM   #4
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Thanks Indy,
Just checked.... it's a GU2, therfore a 2.73 rear gear ratio. Many, many thanks... Now I can go program my HyperTech!

Thanks again,
Daryl
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Old 12-14-2002, 01:25 PM   #5
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thanks also to Forged 281. Good piece-of-mind confirming that gear ratio!

Thanks much,
Daryl

P.S.- what's so bad about the looks of the Camaro?
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Old 12-14-2002, 05:56 PM   #6
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ok not to start a flame its just my opnion of why i dont like the looks 1. the dash is too long feels like your sitting in a cockpit 2. seats feel like you are seating on the ground not really comfortable to me 3. passanger side theres that bump i guess where the tranny is i dunno? 4. 93-97s look worse 98-02 dont look as bad i just dont like the look of the long nose NOW the transam even though on the inside i dont like those for the same reason, on the outside i think they just look plain mean
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Old 12-14-2002, 06:31 PM   #7
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Lots of people say they dont like the hump.. Allthough ost people have never rode in the passenger side of a f-body yet they still say they dont like it. Doesnt effect the driver. And i dont even notice it if im in the passenger seat.

The low seating is fine to me.. all the old musclecars were like that. plus with my power seats i can raise the seat.. and its fine.

You sound like %95 of the corral who have never drover ridden in an F-body
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Old 12-14-2002, 09:20 PM   #8
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96Forged281;

Don't be so critical of the F-bodies, if you had any real taste at all, YOU WOULD NOT BE DRIVING A FORD IN THE FIRST PLACE!!!

JMHO

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Old 12-14-2002, 09:33 PM   #9
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Where do you guys find the GU2/GU5, I heard it's in the glove department..I remember there was a paper stick to the glove department but it's gone now...so 3.42 was on all M6 from 93-97 or was it an option at one time.
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Old 12-14-2002, 09:52 PM   #10
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sorry thought I was in the LT1 tech
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Old 12-14-2002, 11:45 PM   #11
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Quote:
Originally posted by 96Forged281
ok not to start a flame its just my opnion of why i dont like the looks 1. the dash is too long feels like your sitting in a cockpit 2. seats feel like you are seating on the ground not really comfortable to me 3. passanger side theres that bump i guess where the tranny is i dunno? 4. 93-97s look worse 98-02 dont look as bad i just dont like the look of the long nose NOW the transam even though on the inside i dont like those for the same reason, on the outside i think they just look plain mean
I like the cockpit feeling although the dash board and nose are too long. That bump is a little annoying, it is for the cat. on the V6 models. GM could have taken out that bump on the V8 models but they were to cheap and lazy. All is over looked by the raw power.
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Old 12-15-2002, 12:36 AM   #12
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i thought if it had the Z rated tires, 245's, it had 3.23. yes or no? maybe i am wrong........what are other ways of telling that it had 3.23 besides the tac!
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Old 12-15-2002, 01:03 AM   #13
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Originally posted by pineapplesink6
i thought if it had the Z rated tires, 245's, it had 3.23. yes or no? maybe i am wrong........what are other ways of telling that it had 3.23 besides the tac!
Tires have nothing to do with what gears the car has......................it depends on the transmission (obiously ) where the M6 comes standard with 3.42's, and the auto comes standard with 2.73's, while 3.23's are an option (and apparently the car gets an aluminum driveshaft with 3.23's?? ).

You can tell by checking the door jamb sticker (again, GU2 = 2.73, GU5 = 3.23, GU6 = 3.42) or if you're still in 2nd gear at the end of the 1/4 mile........you've got 2.73's!
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Old 12-15-2002, 09:08 AM   #14
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Capn Pete;

I respectfully disagree with your above statement concerning the tires not making a difference in what rearend you get.

When I ordered my 2201 Z28 from the factory (maybe different with 2002), if you did not order the "Z" rated tires (code QLC or QEC I think), you could not get the GU5 or 3.23 rearends. This would also have the cars top speed limiter set to 117 MPH.

I have seen the dealers where I live pull alot of fast ones though. Case in point, I saw a brand new 2002 Z28, with an additional charge of $700 for "Chrome rims", and they mounted the "RSA" tires on them, with the RPO code in the door saying it had the GU5 option, which meens they removed the more expensive tires, with the addition of the chrome rims.

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Old 12-15-2002, 12:21 PM   #15
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Capn Pete;

I respectfully disagree with your above statement concerning the tires not making a difference in what rearend you get.

When I ordered my 2201 Z28 from the factory (maybe different with 2002), if you did not order the "Z" rated tires (code QLC or QEC I think), you could not get the GU5 or 3.23 rearends. This would also have the cars top speed limiter set to 117 MPH.

SteveC
OK, I hear your point...................maybe you must have Z-rated tires to get the 3.23's, but Z-rated tires certainly don't determine what gears you have, since my car (unless it's only the case for 2002's??) has 2.73's and Z-rated tires. You could be right though..........maybe until '02 things were different, because AFAIK, all '02 Z28's & T/A's came with Z-rated tires, while the 3.23 vs. 2.73 was still an option.
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Old 12-15-2002, 12:21 PM
 
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