AT downshift issue - Page 2 - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

FRSBRZGT86FAN · 05-23-2015, 08:25 PM

Quote:

Originally Posted by drewbot

Hmmm I've never felt that after 57000 km

Bad batch of ATs on our part?

N1rve · 05-23-2015, 10:17 PM

Quote:

Originally Posted by FRSBRZGT86FAN

Recorded the issue hopefully you can use it and just say it happens to yours as well:

This oil change I'll bring it up, notice the wheels sqeak when the downshift happens I hope nothing is locking up and its just the sudden deceleration

I never had this type of issue... only issue was when it downshifts, it doesn't make an aggressive downshift noise.

phrosty · 05-23-2015, 11:46 PM

I've had this happen a couple times as well. I haven't noticed any pattern to it. I'm guessing it's a bug in the ECU.

FRSBRZGT86FAN · 05-23-2015, 11:47 PM

Quote:

Originally Posted by phrosty

I've had this happen a couple times as well. I haven't noticed any pattern to it. I'm guessing it's a bug in the ECU.

I've noticed it happens for me only if I drive "normally" from the get go

Bergen23 · 05-24-2015, 09:47 AM

Quote:

Originally Posted by FRSBRZGT86FAN

I've noticed it happens for me only if I drive "normally" from the get go

I emailed my dealer yesterday and explained what was happening, but he said it definitely shouldn't be doing it. He told me to bring it in at some point this week. Then I followed that up with your video and told him my car does the same thing. Have yet to hear back about that, but at least I'm not being brushed off, so that makes me happy.

Get in touch with your dealership and see what they say!

BlueDubbinTDI · 05-24-2015, 10:00 AM

I've only had a rev dip in 3rd or 4th and only after dropping down 2 gears quickly in manual mode. And only sometimes. It's as if the software can't decide what it wants to do sometimes...

carma143 · 05-24-2015, 02:22 PM

In manual mode, are you WOT between shifts? That could create a large sudden change in acceleration, or "jerk" if the automatic transmission is just not fast enough, caused by the wheels operating at a speed different to what the car is actually moving at.

Driving a manual, you quickly learn how to not create a large "jerk" between shifts by releasing most or all of the throttle when shifting up and applying enough throttle for rev-matching for downshifts.

I have never driven an automatic BRZ.

FRSBRZGT86FAN · 05-24-2015, 03:18 PM

Quote:

Originally Posted by carma143

In manual mode, are you WOT between shifts? That could create a large sudden change in acceleration, or "jerk" if the automatic transmission is just not fast enough.

Driving a manual, you quickly learn how to not create a large "jerk" between shifts by releasing most or all of the throttle when shifting up and applying enough throttle for rev-matching for downshifts.

I have never driven an automatic BRZ.

Nope I've driven manual before its this is just a really slow downshift and lack of any sort of rev match and its regardless of wot or not, you've come to the thread a little late lol

drewbot · 05-24-2015, 03:28 PM

WOT has no issues whatsoever. Just completed a track day yesterday and no weirdness

FRSBRZGT86FAN · 05-24-2015, 03:32 PM

Quote:

Originally Posted by Bergen23

I emailed my dealer yesterday and explained what was happening, but he said it definitely shouldn't be doing it. He told me to bring it in at some point this week. Then I followed that up with your video and told him my car does the same thing. Have yet to hear back about that, but at least I'm not being brushed off, so that makes me happy.

Get in touch with your dealership and see what they say!

I'll try and get in touch but the problem is my schedules getting busy with work and school

and not having a car for even a day would be a problem. Please do us a favor and post here what your dealer finds
Also the issue is becoming increasingly more common

FRSBRZGT86FAN · 05-25-2015, 01:22 PM

Update: although it's memorial day weekend I contacted them via email and will wait for a response on Tuesday, hopefully they can reproduce this otherwise I will ask to take a tech out on a drive

carbonBLUE · 05-25-2015, 02:47 PM

Quote:

Originally Posted by carma143

In manual mode, are you WOT between shifts? That could create a large sudden change in acceleration, or "jerk" if the automatic transmission is just not fast enough, caused by the wheels operating at a speed different to what the car is actually moving at.

Driving a manual, you quickly learn how to not create a large "jerk" between shifts by releasing most or all of the throttle when shifting up and applying enough throttle for rev-matching for downshifts.

I have never driven an automatic BRZ.

i second this. i have not had the same problem as described above but i know that if i change my throttle input during any part of the shift the engine and transmission get a little confused

FRSBRZGT86FAN · 05-25-2015, 03:52 PM

Quote:

Originally Posted by carbonBLUE

i second this. i have not had the same problem as described above but i know that if i change my throttle input during any part of the shift the engine and transmission get a little confused

Problem is this occurs without any throttle input....

FRSBRZGT86FAN · 05-26-2015, 10:44 AM

Appointment set for Friday they've scheduled a technician to drive the car for 45 minutes and try to reproduce the issue, either that or do doughnuts in my car.....

05-23-2015, 11:46 PM	#17
phrosty Senior Member Join Date: Apr 2013 Drives: 2013 FR-S Location: Seattle Posts: 806 Thanks: 202 Thanked 321 Times in 199 Posts Mentioned: 18 Post(s) Tagged: 1 Thread(s)	I've had this happen a couple times as well. I haven't noticed any pattern to it. I'm guessing it's a bug in the ECU. __________________ 2013 Whiteout 6AT FR-S \| Perrin Inlet Tube + 2.75" CAI \| OpenFlash Header \| P&L Catback \| 4.88 Final Drive \| Dialed in OFT 2.0x Stage 2 E85 \| 18x8 Enkei Raijin + 225/40 Michelin Pilot Super Sport \| 17x7 Stock + 215/45 Michelin X-Ice Xi-2

05-25-2015, 01:22 PM	#25
FRSBRZGT86FAN Senior Member Join Date: Jun 2013 Drives: 2023 GR SUPRA,15 FR-S (SOLD) Location: Philadelphia, PA Posts: 4,234 Thanks: 3,087 Thanked 2,101 Times in 1,397 Posts Mentioned: 31 Post(s) Tagged: 2 Thread(s)	Update: although it's memorial day weekend I contacted them via email and will wait for a response on Tuesday, hopefully they can reproduce this otherwise I will ask to take a tech out on a drive __________________ SOLDOFT Stage 2 UEL E85/Nameless Performance 3 inch axleback with 5 inch mufflers/ TRD CAI / CNT UEL/ Cusco Strut BAR & LHD Brake Stop / "JDM" Toyota Badges / WinJet JDM headlights - DRL MOD from fteightysix.com - 5000K Diode Dynamics HID kit / Diode Dynamics LED interior Lights and sidemarker bulbs / JDM Clear Sidemarkers / Diode Dynamics LED switchbacks/ OLM LED rear turn signals / Tap Turn RelaySOLD

05-26-2015, 10:44 AM	#28
FRSBRZGT86FAN Senior Member Join Date: Jun 2013 Drives: 2023 GR SUPRA,15 FR-S (SOLD) Location: Philadelphia, PA Posts: 4,234 Thanks: 3,087 Thanked 2,101 Times in 1,397 Posts Mentioned: 31 Post(s) Tagged: 2 Thread(s)	Appointment set for Friday they've scheduled a technician to drive the car for 45 minutes and try to reproduce the issue, either that or do doughnuts in my car..... __________________ SOLDOFT Stage 2 UEL E85/Nameless Performance 3 inch axleback with 5 inch mufflers/ TRD CAI / CNT UEL/ Cusco Strut BAR & LHD Brake Stop / "JDM" Toyota Badges / WinJet JDM headlights - DRL MOD from fteightysix.com - 5000K Diode Dynamics HID kit / Diode Dynamics LED interior Lights and sidemarker bulbs / JDM Clear Sidemarkers / Diode Dynamics LED switchbacks/ OLM LED rear turn signals / Tap Turn RelaySOLD

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05-24-2015, 10:00 AM	#20
BlueDubbinTDI Senior Member Join Date: Mar 2013 Drives: 2013 FR-S, 2012 MCS Location: Jax, FL Posts: 1,975 Thanks: 943 Thanked 570 Times in 356 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	I've only had a rev dip in 3rd or 4th and only after dropping down 2 gears quickly in manual mode. And only sometimes. It's as if the software can't decide what it wants to do sometimes...

05-24-2015, 02:22 PM	#21
carma143 Senior Member Join Date: Jan 2014 Drives: Toyota Highlander; Subaru BRZ (SWP) Location: California Posts: 431 Thanks: 137 Thanked 156 Times in 95 Posts Mentioned: 1 Post(s) Tagged: 2 Thread(s)	In manual mode, are you WOT between shifts? That could create a large sudden change in acceleration, or "jerk" if the automatic transmission is just not fast enough, caused by the wheels operating at a speed different to what the car is actually moving at. Driving a manual, you quickly learn how to not create a large "jerk" between shifts by releasing most or all of the throttle when shifting up and applying enough throttle for rev-matching for downshifts. I have never driven an automatic BRZ.

05-24-2015, 03:28 PM	#23
drewbot ( ͡° ͜ʖ ͡°) Join Date: Sep 2013 Drives: '13 Whiteout FR-S A/T Location: Mississauga, ON Posts: 1,996 Thanks: 1,985 Thanked 1,452 Times in 752 Posts Mentioned: 36 Post(s) Tagged: 1 Thread(s)	WOT has no issues whatsoever. Just completed a track day yesterday and no weirdness

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