[tannji]

I have read that the JDM tranny has a taller gear ratio in 6th.... does anyone know if the USDM has parts available to change final ratio, or if the JDM tranny is easily installable on the USDM STI?
I havent seen the particular question raised, which surprises me, as I have seen almost anyother swap discussed...

tannji

 

[CloNeGTS]

The car isn't even in our hands yet. Any answer to those questions is pure speculation.

And unless I'm missing something, I thought our 'American-ized' tranny was taller than the JDM tranny. Did you mean you want a shorter gear?

The USDM gearing is.....

3.636/2.375/1.761/1.346/0.971/0.756

Look around the site....I know we compared the JDM to USDM gearing somewhere before.

 

[Pizzo]

So what's the final drive ratio on the STi?

 

[4MLA1FN]

3.90

 

[Guru]

We actually get the UK specs on our transmission. It sadly has a little longer 5th and 6th gears. JDM spec is different. Here:

Euro/UK/USA STi

1st - 3.636
2nd - 2.375
3rd - 1.761
4th - 1.346
5th - 0.971
6th - 0.756
Rev - 3.545
FD: 3.90

JDM/Aus STi (and RA)

1st - 3.636
2nd - 2.375
3rd - 1.761
4th - 1.346
5th - 1.062
6th - 0.842
Rev - 3.545
FD: 3.90