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Hi All,
It's fine for your AT to downshift into 1st from 2nd IF (a big IF) your BRZ/FRS has a working "rev matching" feature.
If you downshift into 1st and the car feels like it's slowing down due to engine NOT blipping the throttle for you, it may be something like I experienced.
I even made a video about it to show the dealer. Note, the car will NOT let you downshift into 1st if you are going too fast in which your speed with exceed redline in the speed you are going.
In my situation, rev matching would stop after driving 30+ mins in "D" mode. To fix it temporary, I had to restart the engine.
I took my BRZ to the dealer yeasterday and showed them the video I made. They flashed new updated software to the TCM (Transmission Control Module) and so for so good it's fine.
Anyways here's the video. Is the engine "surge" you guys experiencing what I experienced as rev matching not working when downshifting? Hope this helps.
[ame="https://www.youtube.com/watch?v=AYN19T7ySVo"]BRZ Rev matching failure (Automatic 6 Speed 2015) - YouTube[/ame]
Skip to 1:00 where I start downshifting.
Vic
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