First of all it was supposed to be Engine Computer, not Engine Control~ Sorry about that.
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Originally Posted by brynomon
First it would help if you specified your transmission type and model.
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09 G37 Sedan 7 Speed Automatic Journey Model
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Originally Posted by 09xs
out of curiousity when u floor it and let it shift does it make a squealing noise between gears??
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I haven't experience any squealing.
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Originally Posted by SkyMG37x
As for the TSB, I assume you're referring to the one for the downshift smoothness, and it should definitely apply to your car. Your description of your issue sounds different so not sure if that's what you explained to them but nonetheless the TSB is applicable - they may not have the latest info though. Also, it requires reprogramming of the TCM (Transmission Control Module), not the ECU, so the ECU issue seems separate.
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Yes, that's the one I'm talking about. I took a copy of the TSB to them to show, on the TSB it says for G37 Sport Sedan and mine's not a sport Sedan, so maybe that's the reason.
Here's the link another member posted of a picture of the TSB.
http://www.imagedump.com/index.cgi?pick=get&tp=550499
The service guy stated, and I quote, "We had a technician check out the TSB and there was no update to your TCM, transmission control Module, it either did not need it or yours had the most update software in it."
Well I know I don't have the most recent update since I purchased car in early May and the TSB didn't come out till June 26th.