Im wondering which gears i have in my car. Around what speeds would the car be shiftin into the next gear if i were to have the 3.23's?

 

Look at your RPO codes......thats what I would do. It will say GU_ (2-5)
Then decode it online.

 

If you PM your VIN to me I can send you an option list for your car.

Jim

 

If the gears are stock, the GUx code is the guaranteed way to tell (on the door frame sticker).

If you think they've been swapped by a previous owner, get it into lockup on the highway, make note of the rpm

@55mph
2.73's = 1378rpm
3.23's = 1630rpm
3.42's = 1726rpm
3.73's = 1882rpm

Your stock tach will be off a little bit, so a scanner would really be more precise, but that will at least let you know if someone has done a swap.

 

The "guaranteed" way to see what gear you have is to pull the diff cover and read the ring gear. That takes all the guess work out of it.