slackoff01

I decided to go ahead and look out of curiosity as well and I found something quite interesting.

 

The 2009 Spec B. uses what appears to be the same 6 speed transmission as the STi (minus the STi having different front and real Final ratios while the Spec B has the ratio from the front of the STi) but the 2010 GT which finally got a 6 speed doesn't match up with the STi's 6 speed ratios, meaning its a different transmission.

 

Going further it appears the 2015 WRX uses (almost) the same transmission as the 2010-2010 LGT (5th gear has a 0.002 difference) but the STi still uses the transmission from the previous generation.

 

That WRX transmission I believe will hit 60 in second (barely) and earlier on the thread it seems that the Legacy 3.6 can bolt up to the GT 6 Speed. So I wonder if the new WRX transmission would be feasible for a swap because there are probably more of those available which could possibly drop the price.

 

This is all based on short research, i could be wrong and I would have to dig deeper on it.

2015 wrx is 4.11 final drive and I think a 2011 3.6r is 3.08, it will blow your car up if you managed to make it fit. You would need to also swap rear pumpkin and likely drive shafts (all) to make this work.