Gear Ratio Locator

[rockyiv806]

Where can I go to use my VIN# to find out what Stock Gear Ratio I have? I have a 2000 Trans Am Automatic and I thought it was 3.23 but a lot of people said I might have a 3.73 stock.

Thanks in Advance

[JoshieDoom]

You can find out by looking at your door.

Look for GU5

273s
323s are the only ones in a4 t/as

[35th-ANV-SS]

I thought the OEM gear ratio on your car was 3.23. M6 cars would have a 3.42

http://www.firehawkowners.com/options/make/1.html

Work your way around this website, you may be able to find what you are looking for.

[JoshieDoom]

On base trans am the ratio was 2.73 but you could upgrade to a 3.23 performance axle.

3.73s didnt come in any 4th gens stock.

[rockyiv806]

Ok so what I found out when I called SLP was if your door code is GU2 you have 2.73 gears and GU5 is 3.23 gears. None of the 4th generation cars came with 3.73 gears. If you have the GU2 code, as I do, you still can upgrade clear to 3.73 but you need a bigger housing cost. I was told to contact JT Differential or Just Differential.

[JoshieDoom]

Ok so what I found out when I called SLP was if your door code is GU2 you have 2.73 gears and GU5 is 3.23 gears. None of the 4th generation cars came with 3.73 gears. If you have the GU2 code, as I do, you still can upgrade clear to 3.73 but you need a bigger housing cost. I was told to contact JT Differential or Just Differential.

And that is BS.


You can buy gears alone and be fine.

SLP is the worst company ever

[rockyiv806]

And that is BS.


You can buy gears alone and be fine.

SLP is the worst company ever

Were they at least right about the GU2 being 2.73 and the GU5 being the 3.23?

[JoshieDoom]

Were they at least right about the GU2 being 2.73 and the GU5 being the 3.23?

Yeah, that is in the stickies and about 600 threads.

A ring gear/installation kit is all that is needed for the gear swap.