Here's how the transmission effective gear ratio heat map changes assuming the 2007 STI has a 3.54 final drive:

 

The (probably wrong) source that I used for all of my other numbers shows that the USDM Legacy Spec B trans has the same gearing at the JDM Forester STI (which I show in my spreadsheet).

 

It was off.

Tell Vlad it's 3.54. He said it was 3.9.

 

Yeah that's not remotely correct lol. The spec.B 6spd has 07 sti 1-4 with a longer 5th and 6th.

 

If you want some gear graph ****...

https://forums.nasioc.com/forums/sho....php?t=2466977


Even mentions that typical cost on used R180 is $400-500. That's the **** I'm having a hard time finding.

 

BTW, just because I'm old and probably blind... Where are you guys seeing the Rallipec doc pointing to a 3.54 FD ratio vs. 3.90?

I see a 3.54 reverse transmission gear ratio shown, but not as a final drive.

 

I never looked at that very closely... It seems that 3.54 FD isn't on the list at all.

 

Subaru started using a 1.1:1 output on the 6spds so in order for the actual final drive ratio to match the front final drive and the rear final drive are different. Cars with a 3.90 front final drive and the 1.1:1 reduction got a 3.54 rear differential.

 

Here's what the Rallispec doc says re: FSTI and Spec B Ratios:

 

That makes sense! I was wondering how they were going to have different front and rear ratios without a constantly slipping center diff...

 

Hello.... Oh... Look squirrell

 

Interesting, I didn't realize the Forester got a 6spd in jdm land.

Either way spec.B/FSTI gearing is my favorite Subaru gearing.
Yep rallispec has it listed under the TR column.

 

Have you considered a 5-speed with low range 2nd gear set?



I hear they are big down-under.

 

 

Oh I'll show you something big down under