LS1TECH - Camaro and Firebird Forum Discussion

LT1-LT4 Modifications 1993-97 Gen II Small Block V8

How do i know..

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Old Nov 9, 2009 | 11:54 AM
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Default How do i know..
what rear end i have on my 96 LT1?
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Old Nov 9, 2009 | 12:29 PM
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its probably stock... or you lookin for what gears?
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Old Nov 9, 2009 | 12:36 PM
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yea for what gears, sorry i wasn't specific
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Old Nov 9, 2009 | 12:44 PM
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you can search for a gear calculator i know ive seen it before.. you tried the RPO code? or you can pull cover and count teeth, all kinds of different methods, probably figure a easy one if ya search some. i looked briefly for it but couldnt find it.

the easiest would probably be known exact MPH in 4th gear and a certain RPM
or 3rd if you are auto i didnt pay attention
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Old Nov 9, 2009 | 12:48 PM
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Jack rear up and use jackstands.
Chalk a line on the drive shaft and tire.
Spin tire and count how many revolutions the drive shaft goes vs. one revolution of the tire. If the DS turns 3.42 times then you get the idea...
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Old Nov 9, 2009 | 12:51 PM
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there arent any codes on your car that says?
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Old Nov 9, 2009 | 12:53 PM
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on the highway traveling at 70 my rpms are around 2400-2500
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Old Nov 9, 2009 | 12:57 PM
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its a a4 also
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Old Nov 9, 2009 | 01:01 PM
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From: Jackstandican
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Originally Posted by red-_-z28
there arent any codes on your car that says?
Of course there is, but if you are asking in lieu of the codes then this is a sure fire method to find out what final ratio you have. If you bought the car pre-owned and are not sure whether the gears have been changed etc...
Google has all kinds of gear/mph calculators.
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Old Nov 9, 2009 | 01:01 PM
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Originally Posted by red-_-z28
its a a4 also
A stock A4 is going to have 2.73s or 3.23s.

The RPO sticker on your door will tell you.

Axle codes
GU2 : AXLE REAR, 2.73 RATIO

GU4 : AXLE REAR, 3.08 RATIO (V6)

GU5 : AXLE REAR, 3.23 RATIO

GU6 : AXLE REAR, 3.42 RATIO
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Old Nov 9, 2009 | 01:08 PM
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Why dont i see that? i have 2 stickers, here ill get a pic up for you guys
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Old Nov 9, 2009 | 01:17 PM
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Old Nov 9, 2009 | 01:29 PM
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look in the glove box
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Old Nov 9, 2009 | 03:05 PM
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Originally Posted by djjab57
look in the glove box
Earlier models were in the glove box. Later models on the door. Should be one or the other.
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Old Nov 9, 2009 | 04:08 PM
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Counting driveshaft revolutions versus one tire revolution is the sure-fire way to determine what gears (if you aren't certain the gears are factory).
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Old Nov 9, 2009 | 04:10 PM
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the rpo codes are in your glove box
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Old Nov 9, 2009 | 04:17 PM
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The labe your looking for has a list of RPO codes, most likely glove box thats where my 94, 95, and 97 fbody has it.
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Old Nov 11, 2009 | 01:32 AM
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im sure the gear are factory, i just dont know what they are
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Old Nov 11, 2009 | 06:45 AM
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Originally Posted by red-_-z28
im sure the gear are factory, i just dont know what they are
With the info given in this thread, you should know by now.
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Old Nov 11, 2009 | 06:53 AM
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Originally Posted by red-_-z28
on the highway traveling at 70 my rpms are around 2400-2500

that sounds pretty high for stock 3.23's. i have stock 3.23's and at 2500rpm im at 80mph. you might have a lower gear ratio(higher numerically)
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