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Engine, Exhaust, Transmission Discuss the FR-S | 86 | BRZ engine, exhaust and drivetrain. |
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10-11-2012, 12:01 PM | #29 |
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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.
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11-10-2012, 08:32 AM | #30 |
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Does the paddle shifts alter any of the regular torque conversion etc on the AT?
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11-10-2012, 01:17 PM | #31 |
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I don't think so. Just allows you to control the up/down shifting points in the RPM band.
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11-10-2012, 03:52 PM | #32 |
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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.
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11-15-2012, 07:42 AM | #33 |
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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 |
11-15-2012, 04:00 PM | #34 |
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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.
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11-15-2012, 05:17 PM | #35 | |
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Quote:
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. 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. |
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11-15-2012, 07:40 PM | #36 | |
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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)
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12-04-2012, 10:54 PM | #37 |
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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. |
12-05-2012, 01:55 AM | #38 | |
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Quote:
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12-05-2012, 08:04 AM | #39 |
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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.
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12-05-2012, 11:08 AM | #40 | |
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Quote:
http://kaizenfactor.wordpress.com/20...e-know-so-far/ |
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12-05-2012, 01:35 PM | #41 | |
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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.
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12-05-2012, 01:44 PM | #42 |
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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.
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