Maybe shoebox is right here, I'll have to take anouther look at the ring and pinion I still have.
I am sure they say 3.42 on the axel shafts though.
If you get under your car like right under the pass. door and look back at the axel shaft (the housing not the axel it self) the info of the rear end is stamped in and it tells the ratio. Might have to wire brush off some grime, but it's there.

 

I agree there is a code on the housing. You said axle shaft before.

 

huh huh huh, he said shaft---

you could also track the VIN to find any dealer work. im sure that they keep those kinds of records

 

i would believe some a4 cars have 3.42 gears.

i disagree with whoever said that gm counts everything and doesn't just use up some stuff sometimes.

I have heard that about 15-20%of 2002 fbody ls1's have ls6 blocks, this is a fact that some cars have them. A friend of mine has a ws6 2002 and he has an ls6 block and of course he bought the car new and the block has not been switched out.


TTT,

 

and how does your friend know this?

 

i didn't really believe it at first either,

but here is a topic in my car clubs' forum

http://www.fastlouis.com/forums/view...ht=ls6&start=0

here is what the guy posted,

"Rare 2001 -2002 F-bodys! LOOK!!!! ls6 blocks!

Well today after reading HPP, i read that 10-15% of 2001 fbodys came with ls6 blocks, and 25% of 2002's!
It says to check. Open the hood and on the drivers side to try and see the back of the left hand deck,above the transmisson flange. A cast-in 12561168 means a ls6 block!
Pretty much to my understanding they made enough of the ls6's those years, and just threw some in the fbodys.
Big difference between the ls6 and the ls1 are, ls1 had a 28.5 mm (over 1 inch) ventilation hole drilled through the center of the 5 bulkheads, close to the crank, for bay-to-bay breathing. Powertrain deemed this insufficient for the ls6. So, a new design with much larger,cast-in ventilation hole through the 2,3,and 4 bulkheads toward the bottom of the cylinder bores on both sides was created. This was done to the 2,3,and 4 bulkheads, becasue these were the ones that affected the bay to bay breathing.
This created 87% more ventation on the ls6 block. This improvement paying dividends with less pumping loss at higher rpms's. No offcial Hp gains. Regardless of the fact, the durability of the ls6 block had been increased over the ls1."


You'll also read on that same thread that many ls1 cars had steel driveshafts,

I don't know.....

I just don't think gm is as organized as everyone thinks,



kinda interesting I guess

 

A friend of mine has a 1994 Camaro A4, and swears it has 3.42 ratio. He said it was an option with a special suspension package that his car has. This special option could only be ordered with out t-tops. It's not the 1LE option either, because he has AC. I'm not sure, haven't had a chance to get over and look at his car and check the option codes.

 

My vette came this way from the factory. It happens all the time, they had a limited partnership with NX. I here they ran out of window lock solenoids so they went this route to make up for it.

http://larrymoy.com/pics/2002-08-17_...ay8_show11.jpg
-
http://larrymoy.com/pics/2002-08-17_...ay8_show13.jpg

 

I have that option on my Z24 cavalier when they ran out of moon roofs.

This is kind of a crazy post, I worked for a GM automotive plant on the assembly line, and let me tell you, there are numbers to meet on certain cars with certain options, they are not just going to say "well we ran out of 3.23's so lets put 3.42's in" man that will ruin the gas mileage on an A4 and would be lying on the factory sticker...if there is a screw up at anytime, that line stops until it is fixed, there are bean counters watching at all times micro managing every part that goes on the vehicles. As for a Corvette engine instead of an "LT1 275hp" ??Who in the world told you that, ? I was told my SS has a corvette engine in it, that does not mean its an actual corvette engine? it doesn't have the revised heads, manifolds etc etc, its just based of the same cast iron 350 engine block...

 

I too have a '94.....I have also heard about cars with the 3.42 rear end and the A4, but have yet to see proof. I have not checked mine but have always been curious, as it seems to be a higher gear ration than 3.23's.

I have the RPO code 1AZ or 1A2 can't tell which it is.....but according to a published RPO list it refers to it as a SEO vehicle - Public Service....always wondered what that meant?

Needless to say I am going to crawl under my car tonight and see if I can read the ratio off the axel housing. Isn't there also a test you can do by recording the RPM at a certain MPH to get your ratio?

Later,

Aaron

 

that is it, I am posting the formula for figuring out what your rearend gear ratio is....