Auto-Tranny shifting issue - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

SushiBRZ · 01-21-2022, 02:11 AM

Hello all, I've searched and searched the internet for a fix for my Automatic trans shift problem/slippage and Honestly im stumpt. I have no leads, no ecu codes and im just at a complete loss. The car only has 25k original miles, not boosted, and I have no clue why this issue is happening. Anyone have any clues?

EDIT: at one point i had a p0700 code but that is it.

Video is below.

What I have tried:
I replaced the torque converter completely, with a brand new OEM one and it did not fix it.
That came with a transmission oil change, and diff oil change.
We inspected all connectors and plugs and nothing looked out of order.

VIDEO:

RZNT4R · 01-21-2022, 08:23 PM

You looked at the wrong control module captain.

P0700 is a general transmission fault that sets in the PCM at the request of the TCM, which is where the trouble code that could have helped you was.

You get to the TCM with a better scan tool.

SushiBRZ · 01-21-2022, 08:30 PM

Quote:

Originally Posted by RZNT4R

You looked at the wrong control module captain.

P0700 is a general transmission fault that sets in the PCM at the request of the TCM, which is where the trouble code that could have helped you was.

You get to the TCM with a better scan tool.

I got the code when I was tuning with the OFT I think thats what caused it, because since reverting back to stock tune, the check engine light disappeared.

Espi · 01-21-2022, 11:13 PM

dang what tune did you use before going back stock?

have you tried re-flashing stock tune?

SushiBRZ · 01-21-2022, 11:17 PM

Quote:

Originally Posted by Espi

dang what tune did you use before going back stock?

have you tried re-flashing stock tune?

I flashed the stage 2+ tune that OFT supplies, I ran it for months before this issue suddenly happened. Since it happened I flashed back to Stock, and the issue ensues.

Espi · 01-21-2022, 11:21 PM

hmmm same issue in auto mode? was the video in manual shifting mode?

I'm also AT on stage 2 but its customized.

SushiBRZ · 01-21-2022, 11:29 PM

Quote:

Originally Posted by Espi

hmmm same issue in auto mode? was the video in manual shifting mode?

I'm also AT on stage 2 but its customized.

It happens in both Manual and Drive gears.

steve99 · 01-30-2022, 06:47 AM

https://www.ft86club.com/forums/show...55&postcount=2

TSB out on idle and hard shift issue on 2015 auto, Auto trans computer updated software

SushiBRZ · 01-30-2022, 06:06 PM

Quote:

Originally Posted by steve99

https://www.ft86club.com/forums/show...55&postcount=2

TSB out on idle and hard shift issue on 2015 auto, Auto trans computer updated software

in that video of the issue that guy had, it just looked like rough shifting. In my situation it looks more like it goes in limp mode and revv's out before going into next gear. Do you think its the same issue?

Project_1796 · 02-01-2022, 12:45 PM

Quote:

Originally Posted by SushiBRZ

in that video of the issue that guy had, it just looked like rough shifting. In my situation it looks more like it goes in limp mode and revv's out before going into next gear. Do you think its the same issue?

It doesn't hurt to update the transmission software, issue seems to be the transmission valve body solenoid not engaging on command. you can probably find a whole used auto transmission to swap out or go to a transmission shop to diagnose the issue which would cost the same in parts and labor. good luck on the issue

SushiBRZ · 02-01-2022, 12:49 PM

Quote:

Originally Posted by Project_1796

It doesn't hurt to update the transmission software, issue seems to be the transmission valve body solenoid not engaging on command. you can probably find a whole used auto transmission to swap out or go to a transmission shop to diagnose the issue which would cost the same in parts and labor. good luck on the issue

Should I buy this part and swap it out? I already swapped out the Torque Converter cuz i that that was the problem but it wasn’t.

Project_1796 · 02-01-2022, 01:21 PM

Quote:

Originally Posted by SushiBRZ

Should I buy this part and swap it out? I already swapped out the Torque Converter cuz i that that was the problem but it wasn’t.

Finding a complete low mileage transmission to swap in would be your best option, I've seen some on ebay off 541 motorsports for around $700 shipped

SushiBRZ · 02-01-2022, 01:31 PM

Quote:

Originally Posted by Project_1796

Finding a complete low mileage transmission to swap in would be your best option, I've seen some on ebay off 541 motorsports for around $700 shipped

so costly

Lucky21 · 03-25-2024, 04:55 AM

Were you able to fix this issue?

01-21-2022, 02:11 AM	#1
SushiBRZ Junior Member Join Date: Dec 2021 Drives: Black 2015 BRZ Location: NH Posts: 9 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Auto-Tranny shifting issue Hello all, I've searched and searched the internet for a fix for my Automatic trans shift problem/slippage and Honestly im stumpt. I have no leads, no ecu codes and im just at a complete loss. The car only has 25k original miles, not boosted, and I have no clue why this issue is happening. Anyone have any clues? EDIT: at one point i had a p0700 code but that is it. Video is below. What I have tried: I replaced the torque converter completely, with a brand new OEM one and it did not fix it. That came with a transmission oil change, and diff oil change. We inspected all connectors and plugs and nothing looked out of order. VIDEO: Last edited by SushiBRZ; 01-21-2022 at 02:29 AM.

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01-21-2022, 08:23 PM	#2
RZNT4R Professional Mechanic Join Date: Apr 2010 Drives: 2017 86 6MT Oceanic Location: Quebec, Canada Posts: 789 Thanks: 17 Thanked 634 Times in 371 Posts Mentioned: 12 Post(s) Tagged: 0 Thread(s)	You looked at the wrong control module captain. P0700 is a general transmission fault that sets in the PCM at the request of the TCM, which is where the trouble code that could have helped you was. You get to the TCM with a better scan tool.

01-21-2022, 11:13 PM	#4
Espi Senior Member Join Date: Sep 2019 Drives: 17 BRZ Location: GA Posts: 223 Thanks: 225 Thanked 169 Times in 92 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	dang what tune did you use before going back stock? have you tried re-flashing stock tune?

01-21-2022, 11:21 PM	#6
Espi Senior Member Join Date: Sep 2019 Drives: 17 BRZ Location: GA Posts: 223 Thanks: 225 Thanked 169 Times in 92 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	hmmm same issue in auto mode? was the video in manual shifting mode? I'm also AT on stage 2 but its customized.

01-30-2022, 06:47 AM	#8
steve99 Banned Join Date: Dec 2013 Drives: FT86 Location: Australia Posts: 7,998 Thanks: 1,035 Thanked 4,988 Times in 2,982 Posts Mentioned: 598 Post(s) Tagged: 2 Thread(s)	https://www.ft86club.com/forums/show...55&postcount=2 TSB out on idle and hard shift issue on 2015 auto, Auto trans computer updated software

03-25-2024, 04:55 AM	#14
Lucky21 vroooooooom Join Date: Mar 2019 Drives: 86 Location: . Posts: 51 Thanks: 31 Thanked 32 Times in 15 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Were you able to fix this issue?

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