Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB

Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community - FT86CLUB (https://www.ft86club.com/forums/index.php)
-   Scion FR-S / Toyota 86 GT86 General Forum (https://www.ft86club.com/forums/forumdisplay.php?f=2)
-   -   AT holding 2nd gear to high revs during a long left turn (https://www.ft86club.com/forums/showthread.php?t=30058)

EK_Golfer 03-01-2013 12:15 AM

AT holding 2nd gear to high revs during a long left turn
 
Hey guys, I haven't seen this mentioned anywhere and I wanted to see if this was normal. With the car in lazy full auto mode (sport mode off), during a long left turn, the car will not shift out of second until after the car straightens out for a bit after the turn. I'm not mashing on the accelerator or anything and the engine will rev up to 4k+ rpm which is definitely high when not using sport mode. Could it be when the car senses the weight shift during a turn (limited slip differential kicking in) the AT will instinctively hold the current gear?

edward 03-01-2013 12:40 AM

IIRC, It's a feature. Shifting mid-turn unsettles the chassis, which could result in a spin if you're driving at the limit, so the transmission tries to avoid this.

I could be wrong here, but I think I remember reading about this. I drive an MT, so I can't test this.

fistpoint 03-01-2013 12:42 AM

Quote:

Originally Posted by edward (Post 764787)
IIRC, It's a feature. Shifting mid-turn unsettles the chassis, which could result in a spin if you're driving at the limit, so the transmission tries to avoid this.

That's exactly what I pictured in my head when reading his post. It makes sense.

EK_Golfer 03-01-2013 01:04 AM

Quote:

Originally Posted by edward (Post 764787)
IIRC, It's a feature. Shifting mid-turn unsettles the chassis, which could result in a spin if you're driving at the limit, so the transmission tries to avoid this.

I could be wrong here, but I think I remember reading about this. I drive an MT, so I can't test this.

Yeah I was thinking this was the reason, but wasn't sure if the AT was programmed that way. Just making sure my tranny is going crazy on me.

KayC 03-01-2013 05:35 AM

The car is telling you to power out and kick the tail out

trinitron 03-01-2013 08:35 AM

I don't think it is an issue. Just tap the paddle shifter and upshift

MVJ1975 03-01-2013 08:40 AM

Yes, normal behavior. Even in "lazy" mode it's more aggressive than your average autobox.

naikaidriver 03-01-2013 09:01 AM

All FRS's are equipped with accelerometers that are tied into the ECU. This is how the VCS Sport function gets its attitude adjustment data to let you get a "little" sideways before the TCS and VCS kicks in.

Because of this, in an auto, the ECU may hold a shift for the same reasons stated above. Its even more exaggerated when the transmission is in "Sport" mode.

Scott

Asphalt~86 03-01-2013 09:20 AM

Quote:

Originally Posted by naikaidriver (Post 765258)
All FRS's are equipped with accelerometers that are tied into the ECU. This is how the VCS Sport function gets its attitude adjustment data to let you get a "little" sideways before the TCS and VCS kicks in.

Because of this, in an auto, the ECU may hold a shift for the same reasons stated above. Its even more exaggerated when the transmission is in "Sport" mode.

Scott

This. When you put in Sport you will definitely notice the exaggeration of it holding the shift out. I found the spot now and it's easy to overcome if you just want a quick upshift with the paddles.

EK_Golfer 03-01-2013 11:35 AM

Quote:

Originally Posted by KayC (Post 765137)
The car is telling you to power out and kick the tail out

On my way to work, there is a large intersection with a huge left turn, I would love nothing more than to slide through that turn like a boss.


All times are GMT -4. The time now is 04:12 AM.

Powered by vBulletin® Version 3.8.11
Copyright ©2000 - 2026, vBulletin Solutions Inc.
User Alert System provided by Advanced User Tagging v3.3.0 (Lite) - vBulletin Mods & Addons Copyright © 2026 DragonByte Technologies Ltd.


Garage vBulletin Plugins by Drive Thru Online, Inc.