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Old May 12, 2014 | 06:53 PM
  #1  
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timz83
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Unhappy transmission problem

Hi does anyone know the difference with the 2012 g37 vs the 09 g37 transmission. I have a 09 and the gear delays when I use the paddle shift and the gear also takes longer to change out when am not in sport mood while the 2012 g37 change out faster and has more Power To me. I read up on both car specs and they have the same. I was thinking about getting a transmission flush at the dealer . Does anyone have any suggestions please?
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Old May 12, 2014 | 10:33 PM
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alanro
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From: taylors, s.c.
transmission

I have an 09 S coupe 7AT.
It has 50k miles, my local dealer did a $100.00 drain and fill at 45k miles, just to stay ahead.
Drain and fill plugs are both on the bottom of the pan.
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Old May 12, 2014 | 11:25 PM
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G37Some
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the delay from paddle shifters is normal with the car. after i got my car tuned the shifts have been noticeably crisper and quicker. some have also said a simple grounding kit removes the delay from shifting

*search button*
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Old May 12, 2014 | 11:41 PM
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Do the grounding wire in your engine bay. It improved my shift times.

https://www.myg37.com/forums/d-i-y-i...-your-own.html
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Old May 13, 2014 | 12:14 AM
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Also need to be sure you have the most current TSB reflash applied to your 7AT, there's been 2 or 3 since the 09 came out.
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Old May 13, 2014 | 05:56 AM
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Grounding kits do not do anything. Change the trans fluid
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Old May 13, 2014 | 06:41 AM
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cecrops
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From: Florida
Originally Posted by Surfnazi
Grounding kits do not do anything. Change the trans fluid
That sounds like you know exactly what you're talking about there. Can you please explain how the grounding wire kit does nothing? I would love to hear this
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Old May 14, 2014 | 06:29 AM
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Spreading the grounding points by using the wires does not help with performance. This has been around since I got my first g35
6mt in 2003. But hey you're probably the type that has a turbinator in your intake as well.
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Old May 14, 2014 | 07:47 AM
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cecrops
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Originally Posted by Surfnazi
Spreading the grounding points by using the wires does not help with performance. This has been around since I got my first g35
6mt in 2003. But hey you're probably the type that has a turbinator in your intake as well.
Oh wow, grounding wires have been around since you got you g35? That helps a lot! You have certainly backed up your statement with a lot of facts. I mean, maybe if you insulted my intelligence some more by saying I had an ebay turbo kit too, it might have helped your case some more!

I asked you for proof to back your claim since you sound like you know what you're talking about so concretely. You then retort with zero facts and feel like getting a personal jab in there at me. Thanks for your insightful post. I mean I guess it's my fault for asking someone with **** in their name.

Your mind is obviously made up but I do suggest you read through the grouding wire DIY to better inform yourself. Here is an independent analysis of the grounding wires by a fellow member.

Originally Posted by chlutz214
challenge accepted!

just installed mine, took some videos before and some after, and im about to analyze them and ill post them up so everyone can see. as for first impressions, it seemed like the lag was a little bit less in manual DS mode, but the videos will show us the truth lol

Edit:
ok so i opened the videos in movie maker so i could get time comparisons.

keep in mind that these times are at .25x speed so it all really happened about 4x faster, and the time codes dont match up because they are from different parts of different videos obviously... but here's the numbers i got for 4th gear going on 5th (the other gears were a bit harder to do because of shortness)

the click is the sound of the shifter shifting.

4th gear b4 wires-
53.57 click @ 3200RPM
54.62 changes number to 5
57.53 shifts (RPMs drop) @ 3300

57.52 - 53.57 = 3.95 (or about 1 full second real time)

4th gear after wires-
11.61 click @ 3050 rpm
11.66 changes number to 5
13.72 shifts (RPMs drop) @ 3150

13.72 - 11.61 = 2.11 (about 1/2 of a second real time)

the initial time is DOUBLE the time with wires... even with driving variances and the slight difference in shift RPM that is a HUGE diferance. it would seem to me that this did in fact reduce shift time.

but heres the videos i took. if someone wants to try to check the times themselves and maybe find more comparable shifts than it would be nice if you post your results:
Zippyshare.com -
Again, if you can defer your insults and provide me with any facts or evidence that the big three kit "does nothing" I am still very interested to hear how!
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Old May 14, 2014 | 07:58 AM
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Originally Posted by Surfnazi
Spreading the grounding points by using the wires does not help with performance. This has been around since I got my first g35
6mt in 2003. But hey you're probably the type that has a turbinator in your intake as well.
You're absolutely right, grounding kits do absolutely, positively nothing and are a waste of time!

on a 6MT where shifting isn't controlled electronically...

As someone who thought they were worthless until I actually tried it. I can confirm that they do work. They even make the Bose stereo sound clearer.

Oh and no I don't have a turbinator in my intake... You shouldn't be so quick to insult people without doing some research first....
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Old May 14, 2014 | 08:15 AM
  #11  
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cecrops
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Originally Posted by Tachyon
You're absolutely right, grounding kits do absolutely, positively nothing and are a waste of time!

on a 6MT where shifting isn't controlled electronically...

As someone who thought they were worthless until I actually tried it. I can confirm that they do work. They even make the Bose stereo sound clearer.

Oh and no I don't have a turbinator in my intake... You shouldn't be so quick to insult people without doing some research first....

Thank you Tachyon for an independent view of how the wires did positively effect your shift times in an automatic. I would even go as far as suggesting the kit for a 6MT because like you said, you can get better audio, so at least there's that. You are absolutely correct that they will do nothing when it comes to shifting a manual

In the case of the OP, I stand by my recommendation, it cost me under $20 to build the kit and also have better shifting times because of it.
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Old May 14, 2014 | 10:50 AM
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Tachyon
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From: NY
Originally Posted by cecrops
Thank you Tachyon for an independent view of how the wires did positively effect your shift times in an automatic. I would even go as far as suggesting the kit for a 6MT because like you said, you can get better audio, so at least there's that. You are absolutely correct that they will do nothing when it comes to shifting a manual

In the case of the OP, I stand by my recommendation, it cost me under $20 to build the kit and also have better shifting times because of it.
My pleasure! That was definitely the easiest mod I have ever done. I went with 4ga wires and got some loom to hide the wires so it cost me a little more but not much.

To OP I have an 08 5at and when I first got my car with 35k on it the manual shifting was so laggy I would never use it. I did a throttle body cleaning, grounding kit, Transmission flush (not just drain and refill) and an ECU reset. Now the throttle response has improved a lot and it shifts twice as fast as before.

I actually enjoy driving with the paddles now.

Next I will be upgrading the valve body and getting a tranny cooler.

Last edited by Tachyon; May 14, 2014 at 10:51 AM. Reason: spelng
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