I'm planning on buying a g37 in the near future. Would you guys recommend getting a 5AT over the 7AT?

 

G37's only have 7AT's or 6MT.

 

Loarmistead: can you confirm which tsb was asked to your car? Does it say TSB10-075 on your work ticket?

 

I think it did. I don't have the ticket with me, but I'll check it tomorrow and report back.

 

I had mine done last week, honestly can't see/feel much difference. Almost seems like performance is down a bit but I don't see how that's possible.

It does seem to hold the gear just slightly more when accelerating normally, which is good.

I was hoping the engine braking while coasting from 50 MPH would lessen but it's about the same as it was before.

Will try DS mode tomorrow to see how that behaves...

 

it is true for sedans

'08 G37 coupe had 5AT or 6MT

 

the perception of performance loss is due to the tranny being more "tamed" now. the reflash mellows it out and it may seem like it is not as aggressive as before. this results in the smoother gear changes. that's what the dealer told me at least.

 

My smoother ride is still holding steady. I got stuck in rush hour traffic yesterday, and the car didn't lag up, hesitate and engine brake me to death in the stop and go traffic. Hell yes.

As for the TSB on the invoice... I don't think it says. It has a line item indicating that TSB wok was done, but it didn't have the number of the TSB in this thread next to it. It had a number containing 0s and a 9. I typed it into Google and the TSB for the squealing brakes came up... but nothing about the transmission. So I'm not sure if they typed in the wrong number or if that number on the receipt is a system number unrelated to which TSB they performed.

 

Close to 12K miles on my 2011 G37 Sedan (bought in Oct 2010)...went for my (second?) service, and mentioned about harsh downshift (bump from 2nd to 1st) in transmission...service sheet showed ECU reset was done and ITB 10-075 performed/applied...

Have to say there is a distinct positive difference in the 'smoothness' of the transmission...dont think I have seen a lag or any other problem in any other aspect of the transmission (its just been 150-odd miles since, though)...

Thanks to everyone on this thread for contributing detailed and helpful inputs...much happier driving my car now...

Regards
Anant

 

after ECU reset and ITB10075 on my 09 g37 w/ 20,000miles, it feels much smoother, it feels like it is a different

 

My dealer said that the ECU update would make my car less responsive and that Infiniti was working on another update. He suggested I wait a month. Has anyone heard that?

Dave

 

dseltz, when I brought my 2010 G37X in for a consumers Affairs complaint (the story is well documented in here), the District Manager (DM), who confirmed in the test drive with me that the quirkiness / lagging exists in the 7AT, indicated that "Infiniti is looking at another possible update - Fix, but can't promise that"....

 

I just purchased a new 2011 G37s a little over two weeks ago and have just under 1K miles on it. I too have noticed some jerking at lower speeds and some lag when I gas it, especially when I am at a full stop or trying to merge onto the freeway. Occasionally, I'll see the RPM jump just slightly. I just called the dealer today and mentioned this to them. They said that this is normal behavior for new cars, up to 2K miles due to the adaptive learning of the driver's habits. If after 2K miles or at my oil change I'm still having these issues, they'll take a look at it.

Are the blowing smoke up my *** to avoid dealing with the issue or is this normal?

 

What you experiencing is "normal" in a bad way as this happens to quite a few of us. I have 2009 G37Sx sedan and I am the lucky few that had the TSB updated and it did minimize the harsh shifting greatly (dont even notice it now). The TSB does not address the "lag" (someone correct if I am wrong). However, maybe a hypertech? See my review on it. Knowing what I know now, I personally would not apply the update.

https://www.myg37.com/forums/engine-...got-it-32.html

 

My 2011 G37 is okay with down shift when it's going straight. The problem I have is when I am making a low speed (20-30 mph) right turn, the down shifting won't happen for up to 2 seconds with the gas half way pressed. when it does downshift, I often will see the ETC light blinking. I wonder if the down shift lag is really the engine cutting power because it's sensing tire slipping.

I'm getting better tires next week (Pilot Super Sports) and I'll see if that helps.