Automatic BRZ down shifting - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

eric2523 · 08-19-2015, 01:53 AM

Not sure if it is just my car or what but when i down shift generally between 1-2k rpm i get a large jolt usually downshifting from 2nd to 1st. It doesn't feel natural to me comparing it to a 428i's transmission.

The jolting was a lot worse when i had the stock muffler on however when i switched to the Works AB, there was less of a joly from 3rd to 2nd however still a jolt from 2nd to 1st.

Car is about 30,000k miles.

FastWhite · 08-19-2015, 12:18 PM

Had the same issue on my 13 BRZ. I generally equated it to missing a downshift in a manual. I found that the AT ECU liked to be shifted hard.
No one has cracked the AT ECU that I have heard of.

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drewbot · 08-19-2015, 12:25 PM

It's normal....

Just remember, how hard that would be in M/T

quicksilver30 · 08-19-2015, 12:39 PM

I usually let the car decide when it wants to downshift to 1st. I also have the same issue but unless it needs to go down to first I usually don't manually shift down from 2nd to 1st.

FastWhite · 08-19-2015, 12:49 PM

The cut off for a 2-1 downshift is 4000 rpm. I would get the 'LURCH' at the lower rpm's. Generally from 2k-3k rpm. I lived with it. I drove with paddle shifters all the time. So if I got the 'lurch' in auto, I never knew it.

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G-awesome · 08-19-2015, 12:52 PM

It happens on occasion....but don't you just love the sound of the engine/exhaust when you downshift?!?

shu5892001 · 08-19-2015, 01:30 PM

It's normal, when I drive any auto/DCT using paddle shifters, I only downshift as far as 2nd and I let the transmission do it's job from 2nd to 1st.

JonAvalon · 08-19-2015, 01:34 PM

Quote:

Originally Posted by shu5892001

It's normal, when I drive any auto/DCT using paddle shifters, I only downshift as far as 2nd and I let the transmission do it's job from 2nd to 1st.

Yep same here

continuecrushing · 08-19-2015, 01:51 PM

compared to a 428i?

bro...

mid_life_crisis · 08-19-2015, 03:25 PM

Only sort of on topic, but anyone know where to find the thread by the member who had all that work done on his transmission? I tried to search and found a bunch of threads, but not that one.
Oh, and I don't have this problem when I drive in manual mode. Don't know what I'm doing differently.

FastWhite · 08-19-2015, 03:27 PM

@Leiberman I believe.

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FastWhite · 08-19-2015, 05:51 PM

Try @wlfpck "Automatic Transmission (AT) info and upgrade thread"

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mid_life_crisis · 08-20-2015, 06:30 AM

Quote:

Originally Posted by FastWhite

Try @wlfpck "Automatic Transmission (AT) info and upgrade thread"

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I appreciate the try, but that's one of the ones I found. I'm looking for a review of their products. I remember someone who got the valve body seeming disappointed. I was wondering if that opinion changed. It's just idle curiousity, it isn't like I'm rushing out to mod my transmission.

08-19-2015, 12:39 PM	#4
quicksilver30 Member Join Date: Sep 2012 Drives: '13 LR BRZ Limited\| '07 Jeep GC Location: Ohio Posts: 56 Thanks: 22 Thanked 22 Times in 16 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	I usually let the car decide when it wants to downshift to 1st. I also have the same issue but unless it needs to go down to first I usually don't manually shift down from 2nd to 1st. __________________ '13 Lightning Red BRZ Mods: Grimmspeed Cold Air Intake\|FT86SpeedFactory Stage 2 Tune\|FT86SpeedFactory Catted header\|Nameless Catted and Resonated OP/DP\|Perrin Resonated Cat-back\|

08-19-2015, 01:30 PM	#7
shu5892001 Ontario's FT86 Join Date: Aug 2012 Drives: 2016 Lexus GS-F Location: Toronto Posts: 684 Thanks: 261 Thanked 165 Times in 111 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	It's normal, when I drive any auto/DCT using paddle shifters, I only downshift as far as 2nd and I let the transmission do it's job from 2nd to 1st. __________________ 2016 Lexus GS-F PPE EL Headers, Apexi Resonated Mid Pipe, Apexi Drop in, RR Racing Tune, RR Racing Motor Mount, RR Racing USRS. 430WHP. 2020 Volvo V60 Cross Country Polestar Tuned.

08-19-2015, 03:25 PM	#10
mid_life_crisis Senior Member Join Date: May 2013 Drives: FR-S 10 #103 AT Location: NC Posts: 1,519 Thanks: 101 Thanked 599 Times in 347 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	Only sort of on topic, but anyone know where to find the thread by the member who had all that work done on his transmission? I tried to search and found a bunch of threads, but not that one. Oh, and I don't have this problem when I drive in manual mode. Don't know what I'm doing differently. __________________ Necessity may be the mother of Invention but Desperation is quite often the father. “Sex is like Bridge. If you don't have a good partner, you'd better have a good hand.” - Mae West Papa said, "son there's a lot of evil temptations out there. Best to try 'em all so you know which ones to avoid."

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08-19-2015, 12:25 PM	#3
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)	It's normal.... Just remember, how hard that would be in M/T

08-19-2015, 12:52 PM	#6
G-awesome Senior Member Join Date: Jan 2014 Drives: 2015 Firestorm Scion FRS Location: Vancouver Posts: 534 Thanks: 371 Thanked 230 Times in 161 Posts Mentioned: 4 Post(s) Tagged: 0 Thread(s)	It happens on occasion....but don't you just love the sound of the engine/exhaust when you downshift?!?

08-19-2015, 01:51 PM	#9
continuecrushing Join Date: Mar 2013 Drives: 2013 Firestorm FRS Location: Lake Elsinore, CA Posts: 2,707 Thanks: 1,231 Thanked 2,144 Times in 1,003 Posts Mentioned: 73 Post(s) Tagged: 2 Thread(s)	compared to a 428i? bro...

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