01Blk*SS*

iTrader: (4)

how do i figure out what gears i have in my rear end???

jerflash

3.23 auto and 3.42 manual

RaNsOm

iTrader: (2)

or 2.73 for auto. Take a look at your console. If it goes 2, 3, D, N, R then you have 2.73.
If it goes 1,2,D,OD, N, R then you have 3.23's

GT Griller

iTrader: (8)

I think the console applies only to the older LT1 days, my friend has an 02 Z that has the 1st gear selector yet he has 2.73's.

Check ur RPO codes on ur driver side door look for the codes that start with a GU_. GU5 is 3.23, GU6 is 3.42, and GU2 is 2.73.

Tally TransAm

iTrader: (17)

put one small chalk mark on the ds and one small chalk mark on a rear tire. have a buddy roll the car back and count how many times the ds goes around per 1 tire rotation

Blue Hawk

Are you the first owner of the car? I the answer is yes, go with the RPO code like GT Griller said. It's the most simple way.

If you bought it second hand and you think the car was modified by the previous owner, then variables come into play:

What tranny?
Rear tire size?
Speedo recalibrated?

In any case, Tally TransAm's method is the more accurate.

black98

my 98 t/a is an auto and i had 2:73's in it. find out the code for the gears and look inside your door and find it on the white sticker!

01Blk*SS*

iTrader: (4)

its a 2001 SS with a 6spd ill check what the code says, whats the code for 3.73's ??? thanks

01Blk*SS*

iTrader: (4)

i just checked and it says GU6

WS-Sick

If it has stock gears then you have 3.42's. All six speed F-bodies came with 3.42's from the factory.

Blue Hawk

GU2 = 2.73
GU5 = 3.23
GU6 = 3.42

There is no code from GM for the 3.73's (for the f-body). That gear ratio has never been a factory option for the 4th gen Camaro and Firebird.