2010+ Legacy Trans - 6 speeds in the 5mt case

[Rasmus]

In 2010 Subaru introduced to the American Market their 6 gear manual transmission from their European diesel lineup. It was a engineering effort to to fit 6 speeds plus reverse into the old 5 speed case and be able to take all the torque a diesel can generate.

This 6 speed is not at all the 6 speed from the STi. It's offered in the 2010+ Legacy GT, Legacy, and Outback. It's cable shifted making it more adaptable to an 818 project. The dimensions are the same as the 5mt that Factory Five is basing the 818 around.


You can see the cable shifters flopped forward.

It should fit.

There is one difference: The WRX (02-07 at least) have a speed sensor on the trans. The LGT took speed from the wheel sensor IIRC. You can add a sensor to teh LGT trans (friend did it when he swapped a WRX motor into a 2.5RS) but you have to drill into the case and add a plastic speed gear. Not sure all that it entails.

Here's the gearing:
Gear Ratio -------- Top speed (mph) assuming 245/40R17 tires and 7250 rpm limit
1st: 3.454 --------- 35
2nd: 1.947 --------- 62
3rd: 1.296 --------- 93
4th: 0.972 --------- 123
5th: 0.825 --------- 145
6th: 0.695 --------- 173
Final: 4.444:1

That's a very short first gear, extra tall 6th, and a beefy final drive.