What does the 6MT tach on the highway?
 

Hi all, i was wondering what the newer 6MT legacy/outback trans tachs on the highway. As in, what rpm are you at at 70mph? Thinking about getting the trans for my older legacy

Don't often think about it or look at it, but 70-75 MPH is in the 2.0K/2.5K range in sixth.

The gear ratios and final drive differs as well. I'll get out the GPS and take a look. I seem to recall it's higher than 2.5K but less than 3k rpms.

If you can't read the pic, let me know and I'll update.

Take this:

http://www.car-videos.net/tools/speedrpm.asp

Use specs from this:

http://www.cars101.com/subaru/legacy...specifications

/thread

My 2012 6MT turns 2500 RPM at 65 mph. Final drive is 4.111. The 2013 6MT turns 2700 - 2750 RPM at 65 mph. Transmission is identical. Final drive is 4.444.

Best.
Byll

Mine shows 2000 at 65mph in 6th gear, but on the other hand I have the diesel.

You know the mini-6MT is cable shift eh? Might not be so easy to graft that in, and it's going to feel sloppy compared to the rod shift tranny you have now. Then there's the fact that the gears were thinned to fit the extra one into the 5MT-sized case...

My 2013 6MT is turning at around 2750 at 70mph.

I would have to advise putting this tranny in anything. I wish I could trade for your straight up. This is definately the weakest link in this car by a long way. Sloppy,notchey shifts. Horrible when it gets cold out and long throws w/o a short shift kit. Wish there was a cheap way to improve it.

My 2


O

No I did NOT know it was cable shift, I was questioning whether it would even be a direct bolt up. Does it really shift that poorly? If its only about 2700 at 70mph it might not even be worth it. Thanks for the input all!

Cheers

No - the ratios for 5th and 6th gear are different when comparing the 2.5i and 2.5GT, also, the final drive for both transmissions is 4.111 in the Legacy.

Using the calculation site, at 70mph, you would be at 2740rpm in 6th for the 2.5i if it has a 4.111 or 2960 if it has a 4.444 and about 2570 in the 2.5GT

DrD123: 'Tis difficult to know what to believe. My 2012 4.111 final drive number came from:

http://www.cars101.com/subaru/legacy/legacy2012.html

My 2013 4.444 final drive number came from:

http://www.cars101.com/subaru/legacy/legacy2013.html

The RPM at 65 mph in my post, came from observing my own 2012. The RPM at 65 mph in the second instance, came from requesting a number from a fellow board member, who owns a 2013 6MT Legacy.

I did not see that the OP was asking anything at all concerning the GT - or a comparison between the GT and the N/A Legacy transmissions, so all of my numbers are for N/A Legacies in 2012 and 2013. Considering the published difference in final drive between the two years, the differences in RPM seem logical.

If I am wrong, please help me to learn why, instead of simply telling me I am wrong.

Cheers.
Byll

My data comes from the 2012 factory service manual
http://i104.photobucket.com/albums/m...ff/2010fsm.jpg

the 4.444 final drive was in the Outback only - could be that for 2013 they simplified the drivetrains and now the two are the same, but for the 2010-2012, the final drive is 4.111 (I don't have the 2013 FSM, so I can't check that)

Sorry I didn't provide my source. I go by the factory service manuals when I can - both the 2010 and 2012 FSM has the final drive as 4.111 for the Legacy and 4.444 for the Outback, and the top two gear ratios as different for the LGT

For what it is worth, it seems as if we need to know if the 2013 Legacy has the same final drive as the 2012 Outback - as my source clearly indicates. I had also heard this from other sources, but have only seen it written down in the source I indicated to you. As I said, impirical evidence from the board member who said his 2013 engine is turning faster than my 2012 engine - both in 6th gear, at 65 mph - seems to indicate this is true...

And the beat goes on.
Byll