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

FRSBRZGT86FAN · 05-21-2015, 12:21 PM

Hi first issue post,

Occasionally when going into manual mode and then going for a downshift the transmission doesn't rev match it lurches a bit then downshifts into the correct gear and the engine slowly revs up. Also in the same tense it will lurch in the upshift. This issue continues until I restart the car at which point the problem completely disappears

86_dion · 05-21-2015, 08:15 PM

Quote:

Originally Posted by FRSBRZGT86FAN

Hi first issue post,

Occasionally when going into manual mode and then going for a downshift the transmission doesn't rev match it lurches a bit then downshifts into the correct gear and the engine slowly revs up. Also in the same tense it will lurch in the upshift. This issue continues until I restart the car at which point the problem completely disappears

I've had this same issue. No solution. Dont know what causes it. Sometimes those downshifts are scary

AREN · 05-21-2015, 08:48 PM

I've experienced the same issue, probably three times since owning the car for a year. Harsh upshifts and laggy/non rev match downshifts. Restarting the car does make it go away, the other solution was to put in back in "D" and drive for a few miles.

golfyankee2121 · 05-22-2015, 08:37 AM

Hmm. I don't think I've ever experienced a laggy or non-rev matched downshift in my automatic, but I can definitely can speak on harsh upshifts, especially 1st-->2nd. My car, at least until its fully warmed, has always been kinda harsh from 1st-->2nd.

Bergen23 · 05-22-2015, 08:45 AM

Always happens to me after the car is warm. No way to fix except turn it off and let it cool down

drewbot · 05-22-2015, 09:16 AM

I have these types of issues, but it is always so intermittent it is hard to actually replicate and understand.

My feeling is that perhaps I will get a tranny flush (been on the OEM fluid, never changed and now at 56000 km) and maybe that will rectify it

Bergen23 · 05-22-2015, 09:49 AM

Quote:

Originally Posted by drewbot

I have these types of issues, but it is always so intermittent it is hard to actually replicate and understand.

My feeling is that perhaps I will get a tranny flush (been on the OEM fluid, never changed and now at 56000 km) and maybe that will rectify it

I keep meaning to go to the dealer, but like you said, sometimes it's quite intermittent, and I don't want to go to the dealer, bitching and moaning and not have the problem replicate itself.

Not sure if it's a fluid issue though, it's happened to me since the break in period. And I have less than 9000km on my car.

Dadhawk · 05-22-2015, 10:53 AM

Interesting discussion. I've got over 61,000miles on mine probably about 25% driven in manual, and almost every trip with some paddle action, and have not experienced this.

FRSBRZGT86FAN · 05-23-2015, 11:28 AM

Quote:

Originally Posted by Dadhawk

Interesting discussion. I've got over 61,000miles on mine probably about 25% driven in manual, and almost every trip with some paddle action, and have not experienced this.

Its very specific and hard to describe, I could flog the car for an entire drive and not have any issues and the car runs perfectly. But then the next day after driving normally and switching to manual it would behave this way and its only happened twice. I'm not sure where its stemming from but it seems like some sort of software bug?

FRSBRZGT86FAN · 05-23-2015, 11:30 AM

Quote:

Originally Posted by Bergen23

I keep meaning to go to the dealer, but like you said, sometimes it's quite intermittent, and I don't want to go to the dealer, bitching and moaning and not have the problem replicate itself.

Not sure if it's a fluid issue though, it's happened to me since the break in period. And I have less than 9000km on my car.

Quote:

Originally Posted by drewbot

I have these types of issues, but it is always so intermittent it is hard to actually replicate and understand.

My feeling is that perhaps I will get a tranny flush (been on the OEM fluid, never changed and now at 56000 km) and maybe that will rectify it

Quote:

Originally Posted by Bergen23

Always happens to me after the car is warm. No way to fix except turn it off and let it cool down

Quote:

Originally Posted by golfyankee2121

Hmm. I don't think I've ever experienced a laggy or non-rev matched downshift in my automatic, but I can definitely can speak on harsh upshifts, especially 1st-->2nd. My car, at least until its fully warmed, has always been kinda harsh from 1st-->2nd.

Quote:

Originally Posted by AREN

I've experienced the same issue, probably three times since owning the car for a year. Harsh upshifts and laggy/non rev match downshifts. Restarting the car does make it go away, the other solution was to put in back in "D" and drive for a few miles.

Quote:

Originally Posted by 86_dion

I've had this same issue. No solution. Don't know what causes it. Sometimes those downshifts are scary

Thank YOU! I finally don't feel scared

Nice to know its not just me, I really do think its a software issue, it happened only twice so far and the second time it was after driving the car totally normally then having the urge to go manual, and it just would scare the shit out of me when it would throw it self down a gear without a rev match

Bergen23 · 05-23-2015, 02:21 PM

Quote:

Originally Posted by FRSBRZGT86FAN

Thank YOU! I finally don't feel scared

Nice to know its not just me, I really do think its a software issue, it happened only twice so far and the second time it was after driving the car totally normally then having the urge to go manual, and it just would scare the shit out of me when it would throw it self down a gear without a rev match

Probably software related. But like I mentioned, don't want to go to the dealer complaining about not rev matching, and have them not be able to replicate it.

FRSBRZGT86FAN · 05-23-2015, 04:42 PM

Quote:

Originally Posted by Bergen23

Probably software related. But like I mentioned, don't want to go to the dealer complaining about not rev matching, and have them not be able to replicate it.

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

Bergen23 · 05-23-2015, 05:28 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

The wheels squeak on me when the issue happens as well

drewbot · 05-23-2015, 07:24 PM

Hmmm I've never felt that after 57000 km

05-21-2015, 12:21 PM	#1
FRSBRZGT86FAN Senior Member Join Date: Jun 2013 Drives: 2023 GR SUPRA,15 FR-S (SOLD) Location: Philadelphia, PA Posts: 4,235 Thanks: 3,086 Thanked 2,100 Times in 1,397 Posts Mentioned: 31 Post(s) Tagged: 2 Thread(s)	AT downshift issue Hi first issue post, Occasionally when going into manual mode and then going for a downshift the transmission doesn't rev match it lurches a bit then downshifts into the correct gear and the engine slowly revs up. Also in the same tense it will lurch in the upshift. This issue continues until I restart the car at which point the problem completely disappears __________________ 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

05-22-2015, 10:53 AM	#8
Dadhawk 1st86 Driver! Join Date: Feb 2012 Drives: '13 FR-S (#3 of 1st 86) Location: Powder Springs, GA Posts: 19,811 Thanks: 38,816 Thanked 24,935 Times in 11,375 Posts Mentioned: 182 Post(s) Tagged: 4 Thread(s)	Interesting discussion. I've got over 61,000miles on mine probably about 25% driven in manual, and almost every trip with some paddle action, and have not experienced this. __________________ Visit my Owner's Journal where I wax philosophic on all things FR-S Post your 86 or see others in front of a(n) (in)famous landmark. What fits in your 86? Show us the "Junk In Your Trunk".

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05-21-2015, 08:48 PM	#3
AREN Senior Member Join Date: Aug 2014 Drives: Beige Corolla Location: Milton Posts: 206 Thanks: 103 Thanked 56 Times in 43 Posts Mentioned: 0 Post(s) Tagged: 2 Thread(s)	I've experienced the same issue, probably three times since owning the car for a year. Harsh upshifts and laggy/non rev match downshifts. Restarting the car does make it go away, the other solution was to put in back in "D" and drive for a few miles.

05-22-2015, 08:37 AM	#4
golfyankee2121 Always Moving Forward Join Date: Jan 2014 Drives: 2013 Argento Scion FR-S Location: Jacksonville, FL Posts: 116 Thanks: 147 Thanked 67 Times in 44 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Hmm. I don't think I've ever experienced a laggy or non-rev matched downshift in my automatic, but I can definitely can speak on harsh upshifts, especially 1st-->2nd. My car, at least until its fully warmed, has always been kinda harsh from 1st-->2nd.

05-22-2015, 08:45 AM	#5
Bergen23 Banned Join Date: Dec 2014 Drives: '15 Halo FR-S Location: Ontario, Canada Posts: 1,317 Thanks: 922 Thanked 950 Times in 492 Posts Mentioned: 22 Post(s) Tagged: 0 Thread(s)	Always happens to me after the car is warm. No way to fix except turn it off and let it cool down

05-22-2015, 09:16 AM	#6
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)	I have these types of issues, but it is always so intermittent it is hard to actually replicate and understand. My feeling is that perhaps I will get a tranny flush (been on the OEM fluid, never changed and now at 56000 km) and maybe that will rectify it

05-23-2015, 07:24 PM	#14
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)	Hmmm I've never felt that after 57000 km

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