follow ft86club on our blog, twitter or facebook.
FT86CLUB
Ft86Club
Speed By Design
Register Garage Members List Calendar Search Today's Posts Mark Forums Read

Go Back   Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB > Technical Topics > Engine, Exhaust, Transmission

Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain.


User Tag List

Reply
 
Thread Tools Search this Thread
Old 10-11-2012, 12:01 PM   #29
wlfpck
Senior Member
 
Join Date: Sep 2012
Drives: 2015 GTI
Location: OH, TX, IL
Posts: 165
Thanks: 5
Thanked 72 Times in 33 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Updated the torque converter section.

Also... thought I would mention this... while the Lexus IS series does not have launch control (I am not including the IS-F in this) the LFA does. Launch control if I am correct, is essentially a computer program.
__________________
2013 GTI - Gone
2015 GTI
wlfpck is offline   Reply With Quote
Old 11-10-2012, 08:32 AM   #30
invisage
Senior Member
 
Join Date: Sep 2012
Drives: Thunder Silver 86 GTS
Location: Perth Australia
Posts: 139
Thanks: 25
Thanked 106 Times in 39 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Does the paddle shifts alter any of the regular torque conversion etc on the AT?
invisage is offline   Reply With Quote
Old 11-10-2012, 01:17 PM   #31
Captain Insano
Senior Member
 
Join Date: Sep 2012
Drives: 2014 Jeep Wrangler RubiconX
Location: Midwest, USA
Posts: 1,282
Thanks: 110
Thanked 292 Times in 224 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
I don't think so. Just allows you to control the up/down shifting points in the RPM band.
Captain Insano is offline   Reply With Quote
Old 11-10-2012, 03:52 PM   #32
Shimmyshake
Senior Member
 
Shimmyshake's Avatar
 
Join Date: Dec 2011
Drives: Whiteout FR-S
Location: Vancouver B.C
Posts: 241
Thanks: 8
Thanked 44 Times in 20 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Do any guys with the auto tranny hear a faint click sound when either shifting from 1st to 2nd and coming to a full stop from 2nd to 1st from the shifter area.
Shimmyshake is offline   Reply With Quote
Old 11-15-2012, 07:42 AM   #33
Captain Insano
Senior Member
 
Join Date: Sep 2012
Drives: 2014 Jeep Wrangler RubiconX
Location: Midwest, USA
Posts: 1,282
Thanks: 110
Thanked 292 Times in 224 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Interesting question I posed in this thread. Not sure if final drive change in AT would affect the software/ECU negatively. Thoughts?

http://www.ft86club.com/forums/showt...d=1#post558393
Captain Insano is offline   Reply With Quote
Old 11-15-2012, 04:00 PM   #34
soros151
SorosMotorsports
 
soros151's Avatar
 
Join Date: Oct 2012
Drives: Whiteout Pearl
Location: Orlando, Fl//Scion FR-S
Posts: 233
Thanks: 191
Thanked 36 Times in 31 Posts
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Garage
auto transmission here. Watching. BTW, doesn't the Sport Mode and VSC Sport Mode help with traction and power delivery to the wheels? Shifts become crisper and power gets delivered faster and not as smooth.
soros151 is offline   Reply With Quote
Old 11-15-2012, 05:17 PM   #35
arghx7
Senior Member
 
Join Date: Nov 2011
Drives: car
Location: cold
Posts: 599
Thanks: 72
Thanked 607 Times in 185 Posts
Mentioned: 33 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Captain Insano View Post
Interesting question I posed in this thread. Not sure if final drive change in AT would affect the software/ECU negatively. Thoughts?

http://www.ft86club.com/forums/showt...d=1#post558393
If you change the final drive, you will change the vehicle speed calculation. The vehicle speed calculation comes from the stability control system, which calculates vehicle speed based on the four wheel speed signals. This could throw off any vehicle-speed based control--not much different than putting on a different sized wheel.

It would depend on how much of a difference you have in tire revolutions between the stock setup and the modified one. It would also depend on how vehicle speed plays into the transmission controls and vehicle dynamics controls.

Quote:
Originally Posted by soros151 View Post
auto transmission here. Watching. BTW, doesn't the Sport Mode and VSC Sport Mode help with traction and power delivery to the wheels? Shifts become crisper and power gets delivered faster and not as smooth.
Those modes definitely affect how much the vehicle dynamics systems intervene in engine operation, by applying braking force or reducing engine torque output. I'm not completely sure how they feed into the transmission control. They would have to affect the torque request calculations.
arghx7 is offline   Reply With Quote
Old 11-15-2012, 07:40 PM   #36
wlfpck
Senior Member
 
Join Date: Sep 2012
Drives: 2015 GTI
Location: OH, TX, IL
Posts: 165
Thanks: 5
Thanked 72 Times in 33 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Captain Insano View Post
Interesting question I posed in this thread. Not sure if final drive change in AT would affect the software/ECU negatively. Thoughts?

http://www.ft86club.com/forums/showt...d=1#post558393
The automatic transmission shifts are based on a lot of things. Without knowing exactly how the programming works in the FR-S/BRZ, it is difficult to say for 100% accuracy.

If I am not mistaken, it shifts when certain criterion are met.

Changing the final drive affecting the ECU negatively (assuming no tune) would depend on...

1) how much of a change?
2) Does the ECU have learning capabilities and how much "learning"
3) how does the ECU determine shift points? (criterion and logic of the programming)
__________________
2013 GTI - Gone
2015 GTI
wlfpck is offline   Reply With Quote
Old 12-04-2012, 10:54 PM   #37
Captain Insano
Senior Member
 
Join Date: Sep 2012
Drives: 2014 Jeep Wrangler RubiconX
Location: Midwest, USA
Posts: 1,282
Thanks: 110
Thanked 292 Times in 224 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Bump... from a specification and performance standpoint how does the toybaru AT compare to the ISF AT (besides one having 8 gears and one having 6)?

http://www.autospies.com/news/In-Det...mission-22472/

EDIT: I looked around... is this an IS250 trans with LFA "LIKE" controlling software? Anybody know?

Last edited by Captain Insano; 12-04-2012 at 11:22 PM.
Captain Insano is offline   Reply With Quote
Old 12-05-2012, 01:55 AM   #38
mit_peid
Boosted Noob
 
mit_peid's Avatar
 
Join Date: Nov 2012
Drives: '13 FRS MT KW SC, '05 4Runner 4WD
Location: SoCal
Posts: 883
Thanks: 353
Thanked 343 Times in 175 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by Captain Insano View Post
Bump... from a specification and performance standpoint how does the toybaru AT compare to the ISF AT (besides one having 8 gears and one having 6)?

http://www.autospies.com/news/In-Det...mission-22472/

EDIT: I looked around... is this an IS250 trans with LFA "LIKE" controlling software? Anybody know?
I'd like to know the answer to this too, anybody?
mit_peid is offline   Reply With Quote
Old 12-05-2012, 08:04 AM   #39
wlfpck
Senior Member
 
Join Date: Sep 2012
Drives: 2015 GTI
Location: OH, TX, IL
Posts: 165
Thanks: 5
Thanked 72 Times in 33 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
If I am not mistaken...

The ISF transmission and the ft86 are not the same transmission (with the exception of one being 6 speed and the other 8).

I believe someone had said that the 6 speed auto more closely ressembles that which is found in the IS350? (if someone has the actual info.)

That being said, it is not the same transmission as the one in the IS350 either. I think that this is a new 6 speed and I also believe that there is talk about putting this transmission into the Lexus IS line up.
__________________
2013 GTI - Gone
2015 GTI
wlfpck is offline   Reply With Quote
Old 12-05-2012, 11:08 AM   #40
mit_peid
Boosted Noob
 
mit_peid's Avatar
 
Join Date: Nov 2012
Drives: '13 FRS MT KW SC, '05 4Runner 4WD
Location: SoCal
Posts: 883
Thanks: 353
Thanked 343 Times in 175 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by wlfpck View Post
If I am not mistaken...

The ISF transmission and the ft86 are not the same transmission (with the exception of one being 6 speed and the other 8).

I believe someone had said that the 6 speed auto more closely ressembles that which is found in the IS350? (if someone has the actual info.)

That being said, it is not the same transmission as the one in the IS350 either. I think that this is a new 6 speed and I also believe that there is talk about putting this transmission into the Lexus IS line up.
I think this website gives a strong argument that the FRS AT is more-or-less the tranny from the IS250 (I think they're geared identically?). It is probably the same physical tranny as the IS250 with more bells and whistles to somehow make it smarter and more responsive as I've heard from others in this forum that the FRS tranny shouldn't be compared to the IS250 tranny since the IS250 tranny sucks. It also also gives other points for why it is not the tranny from the IS-F nor the IS350.

http://kaizenfactor.wordpress.com/20...e-know-so-far/
mit_peid is offline   Reply With Quote
Old 12-05-2012, 01:35 PM   #41
wlfpck
Senior Member
 
Join Date: Sep 2012
Drives: 2015 GTI
Location: OH, TX, IL
Posts: 165
Thanks: 5
Thanked 72 Times in 33 Posts
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quote:
Originally Posted by mit_peid View Post
I think this website gives a strong argument that the FRS AT is more-or-less the tranny from the IS250 (I think they're geared identically?). It is probably the same physical tranny as the IS250 with more bells and whistles to somehow make it smarter and more responsive as I've heard from others in this forum that the FRS tranny shouldn't be compared to the IS250 tranny since the IS250 tranny sucks. It also also gives other points for why it is not the tranny from the IS-F nor the IS350.

http://kaizenfactor.wordpress.com/20...e-know-so-far/
I can not attest to how it compares mechanically. If you read the whole thread you'll see that the transmission code is not the same as what is traditionally used.

The A960E is used in the IS 250. The IS-F uses the AA80E.

The 86 uses the TX6A8GD90A transmission. To me, that indicates that it is not mechanically the same.

The article that you linked is from February which the information (if I am not mistaken) is speculations at that time. They dicussed the possibility of which transmissions will be found in the 86.

The reason that many say that the AT from the IS series (disregard the IS-F) can not be compared to the 86 is the fact the programming from the IS is more of setting a limit as to what the highest gear the car can be in is. The shifts are not like the 86 where it is very precise and quick.
__________________
2013 GTI - Gone
2015 GTI
wlfpck is offline   Reply With Quote
Old 12-05-2012, 01:44 PM   #42
Captain Insano
Senior Member
 
Join Date: Sep 2012
Drives: 2014 Jeep Wrangler RubiconX
Location: Midwest, USA
Posts: 1,282
Thanks: 110
Thanked 292 Times in 224 Posts
Mentioned: 7 Post(s)
Tagged: 0 Thread(s)
Good find. That article supports my earlier assumptions, but is a bit dated... Is it possible the IS250 trans and 86 are same or nearly identical with differing part numbers? That sounds very possible reading that article. Sounds like shift software settings is very different either way.
Captain Insano is offline   Reply With Quote
 
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Automatic Transmission devinclfalcons Engine, Exhaust, Transmission 60 04-29-2014 09:42 PM
best way to launch with the automatic transmission ? hankster Tracking / Autocross / HPDE / Drifting 3 09-24-2012 07:06 PM
Transmission information, history. fistpoint Engine, Exhaust, Transmission 2 07-05-2012 01:36 AM
topspeed difference between manual transmission and automatic transmission torquemada BRZ First-Gen (2012+) -- General Topics 51 05-04-2012 07:54 PM
A little information about the Automatic ryude Engine, Exhaust, Transmission 2 12-03-2011 09:13 AM


All times are GMT -4. The time now is 05:04 AM.


Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2024, vBulletin Solutions Inc.
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2024 DragonByte Technologies Ltd.

Garage vBulletin Plugins by Drive Thru Online, Inc.