Automatic BRZ down shifting
 

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.

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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It's normal....

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

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.

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

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 :thumbsup:

compared to a 428i?

bro...

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.

@Leiberman I believe.


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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.