Manual Trans gearing for 2017 model ? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

ToySub1946 · 09-08-2016, 01:18 AM

I've read the differential gearing has been changed from 4.1 to 4.3

I've read that 6th gear has been strengthened.

I've read that overall mileage figures are lower than older models.

I cannot find anything about gear ratio changes within the manual six speed transmission.

Certainly sixth gear must have been changed to allow for not too high revs at freeway speeds and above.

Anyone have info on actual gear ratio changes ?

wireman957 · 09-08-2016, 07:56 PM

Googled this just now:
http://www.cars.com/toyota/86/2017/specifications/

Guff · 09-08-2016, 08:07 PM

I don't remember reading about a ratio change in the official Toyota documentation. I believe it's still 0.767.

goldenfri · 09-08-2016, 08:51 PM

Quote:

Originally Posted by ToySub1946

I've read the differential gearing has been changed from 4.1 to 4.3

I've read that 6th gear has been strengthened.

I've read that overall mileage figures are lower than older models.

I cannot find anything about gear ratio changes within the manual six speed transmission.

Certainly sixth gear must have been changed to allow for not too high revs at freeway speeds and above.

Anyone have info on actual gear ratio changes ?

Gear ratios are the same. You just run a bit more rpm at highway speeds, its not a huge jump.

stevo585 · 09-08-2016, 10:18 PM

So two shifts to 60mph now. You can just barely hit 60 slightly past redline with the 4.10s

NARFALICIOUS · 09-08-2016, 10:28 PM

Quote:

Originally Posted by wireman957

Googled this just now:
http://www.cars.com/toyota/86/2017/specifications/

How did cars.com get the gearing specs but they're not on Toyota or Subaru's website?
I tried searching for the gearing

ToySub1946 · 09-09-2016, 12:05 AM

goldenfri:

"Gear ratios are the same. You just run a bit more rpm at highway speeds, its not a huge jump."

Well I guess my real concern was not for tracking, but how high my engine might rev at very high freeway speeds (causing poorer mpg). In the northwestern inland states and portions of west Texas speed limit can be 80mph...and of course, that means running 90mph or so in reality. Possibly Toyota and Subaru did not consider this. So I'm ready for a 7 speed as in Porsche and Corvette...if 6th gear ratio has not changed since 2016 models/combined with the now (for 2017) 4.3 diff.

churchx · 09-09-2016, 02:38 AM

Or just do unexpected mod .. of installing 4.1 diff

if you prefer older year ratios and mpg / rpms @ high speed are more important then acceleration.

Wayno · 09-09-2016, 02:43 AM

Just swap with someone with a older MY or an AT, there won't be a shortage of takers. You should even be able to get the other party to do all the work. The gearing on the MT is fairly short anyway so you won't be losing much either way. Take pity on the MY17 AT owners who got exactly nothing as an upgrade.

churchx · 09-09-2016, 04:47 AM

.. hmm, on second thought, this is first time i heard of different MY2017 gearing .. and starting to think, if THIS might be the reason why bigger performance numbers are cited for new MT & not for AT, with no actual performance affecting changes to engine/ecu tune/etc? Otherwise why else AT would have no gains/improvements, it sounds illogical :/

Wayno · 09-09-2016, 06:24 AM

No, it's because of new engine parts including both manifolds

goldenfri · 09-09-2016, 10:27 AM

Quote:

Originally Posted by ToySub1946

goldenfri:

"Gear ratios are the same. You just run a bit more rpm at highway speeds, its not a huge jump."

Well I guess my real concern was not for tracking, but how high my engine might rev at very high freeway speeds (causing poorer mpg). In the northwestern inland states and portions of west Texas speed limit can be 80mph...and of course, that means running 90mph or so in reality. Possibly Toyota and Subaru did not consider this. So I'm ready for a 7 speed as in Porsche and Corvette...if 6th gear ratio has not changed since 2016 models/combined with the now (for 2017) 4.3 diff.

I am sure they thought of this... it will be fine, you are worrying too much. Gas mileage is more about throttle position than revs, as long as you stay light on the throttle it won't be a big issue. They also made a bunch of engine changes remember, maybe some were to handle the slightly higher highway revs.

As someone that used to have an S2000 with 4.56 gears that thing would be at 5k+ cruising on the highway, it wasn't a problem and still got decent gas mileage.

goldenfri · 09-09-2016, 10:29 AM

Quote:

Originally Posted by churchx

.. hmm, on second thought, this is first time i heard of different MY2017 gearing .. and starting to think, if THIS might be the reason why bigger performance numbers are cited for new MT & not for AT, with no actual performance affecting changes to engine/ecu tune/etc? Otherwise why else AT would have no gains/improvements, it sounds illogical :/

Gears don't provide more horsepower, just increased mechanical acceleration. Dyno pulls are generally done at the closest ratio to 1:1

Scourge · 04-03-2017, 03:41 PM

I don't know if you've found the information but in case you need something from Toyota, this PDF link is active currently... And it is 4.30 for the manual only.

http://toyotanews.pressroom.toyota.c...tions.download

09-08-2016, 01:18 AM	#1
ToySub1946 Senior Member Join Date: Oct 2014 Drives: 15FRS, 05MustangGT, 85Toyota truck Location: Eureka, Ca. Posts: 574 Thanks: 672 Thanked 590 Times in 279 Posts Mentioned: 5 Post(s) Tagged: 1 Thread(s)	Manual Trans gearing for 2017 model ? I've read the differential gearing has been changed from 4.1 to 4.3 I've read that 6th gear has been strengthened. I've read that overall mileage figures are lower than older models. I cannot find anything about gear ratio changes within the manual six speed transmission. Certainly sixth gear must have been changed to allow for not too high revs at freeway speeds and above. Anyone have info on actual gear ratio changes ?

09-08-2016, 07:56 PM	#2
wireman957 Senior Member Join Date: Jul 2015 Drives: 2015 FR-S MT Steel Location: D/FW area Texas Posts: 466 Thanks: 1,387 Thanked 546 Times in 279 Posts Mentioned: 2 Post(s) Tagged: 2 Thread(s)	Googled this just now: http://www.cars.com/toyota/86/2017/specifications/ __________________ "No matter where you go, there you are" - Buckaroo Banzai

09-08-2016, 10:18 PM	#5
stevo585 Senior Member Join Date: Feb 2014 Drives: White 2014 BRZ Location: Orlando, FL. Posts: 519 Thanks: 131 Thanked 155 Times in 109 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	So two shifts to 60mph now. You can just barely hit 60 slightly past redline with the 4.10s __________________ JDL Turbo kit - Ecutek, HRI tuned.

09-09-2016, 02:43 AM	#9
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 895 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	Just swap with someone with a older MY or an AT, there won't be a shortage of takers. You should even be able to get the other party to do all the work. The gearing on the MT is fairly short anyway so you won't be losing much either way. Take pity on the MY17 AT owners who got exactly nothing as an upgrade. __________________ rom downloads, information and examples Toyota 86 GTS OFT - Guide To Dialling In OTS Base Tune OFT - Example Alternate Maps for AT, 98RON, E85, MAF Scales

09-09-2016, 06:24 AM	#11
Wayno Senior Member Join Date: Apr 2014 Drives: Toyota 86 GTS Location: Australia Posts: 1,129 Thanks: 453 Thanked 895 Times in 424 Posts Mentioned: 211 Post(s) Tagged: 0 Thread(s)	No, it's because of new engine parts including both manifolds __________________ rom downloads, information and examples Toyota 86 GTS OFT - Guide To Dialling In OTS Base Tune OFT - Example Alternate Maps for AT, 98RON, E85, MAF Scales

09-09-2016, 12:05 AM	#7
ToySub1946 Senior Member Join Date: Oct 2014 Drives: 15FRS, 05MustangGT, 85Toyota truck Location: Eureka, Ca. Posts: 574 Thanks: 672 Thanked 590 Times in 279 Posts Mentioned: 5 Post(s) Tagged: 1 Thread(s)	goldenfri: "Gear ratios are the same. You just run a bit more rpm at highway speeds, its not a huge jump." Well I guess my real concern was not for tracking, but how high my engine might rev at very high freeway speeds (causing poorer mpg). In the northwestern inland states and portions of west Texas speed limit can be 80mph...and of course, that means running 90mph or so in reality. Possibly Toyota and Subaru did not consider this. So I'm ready for a 7 speed as in Porsche and Corvette...if 6th gear ratio has not changed since 2016 models/combined with the now (for 2017) 4.3 diff.

09-09-2016, 02:38 AM	#8
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,333 Thanks: 696 Thanked 2,085 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	Or just do unexpected mod .. of installing 4.1 diff if you prefer older year ratios and mpg / rpms @ high speed are more important then acceleration.

09-09-2016, 04:47 AM	#10
churchx Senior Member Join Date: Mar 2015 Drives: 2014 GT86 Location: Latvia, Riga Posts: 4,333 Thanks: 696 Thanked 2,085 Times in 1,436 Posts Mentioned: 53 Post(s) Tagged: 1 Thread(s)	.. hmm, on second thought, this is first time i heard of different MY2017 gearing .. and starting to think, if THIS might be the reason why bigger performance numbers are cited for new MT & not for AT, with no actual performance affecting changes to engine/ecu tune/etc? Otherwise why else AT would have no gains/improvements, it sounds illogical :/

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