G37 Transmission Issues with 4th -> 3rd Downshift

brynomon · 06-29-2009, 09:56 PM

Everyone,

Post after post has been made on this forum regarding rough downshifts and unnecessary enginer braking with the 7AT. Months have gone on and Infiniti has finally released a TSB on this problem.

I just drove my g37xS home and the difference is amazing. I'm no longer preparing for enginer breaking and hard down shifts. The transmission is much better now. So much better I don't think any other tranny in this price range compares. Bravo Infiniti Bravo! and to all of you naysayers in other threads regarding this problem...HA!

The information is as follows:

TSB: ITB09-032
Classification: AT09-009
Release date: June 24, 2009

Applied Vehicles:

2009 G37 Sport Sedan (V36) 2WD and 4WD
2009 G37 Sport Coupe (V36) 2WD and 4WD
2009 FX35 (S51) 2WD
2009 FX35/50 (S51) AWD
2009 M35 (Y50) 2WD Only

Applied Transmission: 7AT ONLY

If you don't believe it... Go Here.http://www.imagedump.com/index.cgi?pick=get&tp=550499

G37beijing · 06-29-2009, 10:08 PM

This is fantastic news! Thank you so much for sharing this information and I cannot wait to have mine reprogrammed.

Mike S. · 06-29-2009, 11:46 PM

Did the update seem to cover more than just the 4-3 downshift? It seems like other downshifts are not as smooth too...like just comming to a stop 3-2-1. Then there is the "flare" issue.

At any rate..hope to have it done soon.

brynomon · 06-29-2009, 11:48 PM

Quote:

Originally Posted by Mike S.

Did the update seem to cover more than just the 4-3 downshift? It seems like other downshifts are not as smooth too...like just comming to a stop 3-2-1. Then there is the "flare" issue.

At any rate..hope to have it done soon.

Well my friend... most of us who thought it was a 3rd to 2nd gear shift was wrong however the 4th->3rd shift affected the quick 3rd to 2nd too.. Trust me your car will feel a world better.

Mike S. · 06-29-2009, 11:53 PM

Can't wait.

gugarci · 06-30-2009, 12:01 AM

I'm curious to see if the sporty nature of the gearbox is still there. Please keep posting your over-all experience with the TSB in this thread. How's the DS mode compared to before. I'm not due for service for a while.

Thanks for info.

brynomon · 06-30-2009, 12:36 AM

Quote:

Originally Posted by gugarci

I'm curious to see if the sporty nature of the gearbox is still there. Please keep posting your over-all experience with the TSB in this thread. How's the DS mode compared to before. I'm not due for service for a while.

Thanks for info.

Sportiness was still there. I didn't try it in DS mode... Too much traffic and honestly I don't use DS mode a whole lot. If I'm not in standard auto i'm doing it in M. I will let you all know tomorrow.

Alex57r · 06-30-2009, 01:14 AM

Very interesting. Will wait to hear more.

hadokenuh · 06-30-2009, 01:14 AM

Great news. Can you do some "spirit" driving tomorrow and let us know if you feel anything different. Thanks!

PeterUbers · 06-30-2009, 10:49 AM

GREAT NEWS AND THANK YOU!!!

I just made an appt with Lisle Infiniti to have them address the issue and/or apply the TSB.

Thanks again -- will give my feedback on the TSB (if applied) after the 12th.

w0ady · 06-30-2009, 11:26 AM

definitely getting this asap.

DarkKnightAZ · 06-30-2009, 11:32 AM

Sweet !!

I just got a brand new G37

It has less than 100 miles, do you think they will apply this service thing to it ?

Ive notice this happening to me while slowing down.

Thanks
DK

Triple_X · 06-30-2009, 11:59 AM

I used to have this problem when there were less than 500 miles on the car. It either went away or I just got so used to it I don't notice anymore. Either way thanks for posting this I'll look into it.

Mike S. · 06-30-2009, 12:41 PM

My appointment is for the 6th of July, I'll let you guys know my impressions right away.

brynomon · 06-30-2009, 01:23 PM

This morning I did more than spirited driving. I was running late so I really pushed her hard with switching between DS and D mode a few times. DS mode appears to perform better as well when going from 50-20 and then back up to 70. Then when the road opened up I had fun with only a couple of lane changes and quick decel's/accels topping out at around 120. It seems as if the transmission programming changes do in fact make the rest of the shifts better. The performance and driveability of this car now has me floored. I will be interested in other peoples opinions after this update...

I must say Fields Infiniti was awesome. They are interested in my feedback on this since I was the first customer with this update and it not only affects the G series but the M and FX's as well.

06-29-2009, 09:56 PM	#1
brynomon Registered User 2009 Infiniti G37 Trader Score: (0) Join Date: Apr 2009 Posts: 129	G37 Rough 4th -> 3rd Downshift = ITB09-032 Everyone, Post after post has been made on this forum regarding rough downshifts and unnecessary enginer braking with the 7AT. Months have gone on and Infiniti has finally released a TSB on this problem. I just drove my g37xS home and the difference is amazing. I'm no longer preparing for enginer breaking and hard down shifts. The transmission is much better now. So much better I don't think any other tranny in this price range compares. Bravo Infiniti Bravo! and to all of you naysayers in other threads regarding this problem...HA! The information is as follows: TSB: ITB09-032 Classification: AT09-009 Release date: June 24, 2009 Applied Vehicles: 2009 G37 Sport Sedan (V36) 2WD and 4WD 2009 G37 Sport Coupe (V36) 2WD and 4WD 2009 FX35 (S51) 2WD 2009 FX35/50 (S51) AWD 2009 M35 (Y50) 2WD Only Applied Transmission: 7AT ONLY If you don't believe it... Go Here.http://www.imagedump.com/index.cgi?pick=get&tp=550499 __________________ '09 G37xS 4Dr Liquid Platinum, Prem., Navi., and some wierd cabbie air freshener... Last edited by brynomon; 06-29-2009 at 10:09 PM. Reason: Original image link did not work.

06-29-2009, 10:08 PM	#2
G37beijing Registered User Trader Score: (0) Join Date: Feb 2009 Posts: 40	This is fantastic news! Thank you so much for sharing this information and I cannot wait to have mine reprogrammed. __________________ G37 Journey-4dr, 7AT, Manufactured in Nov 2008

06-30-2009, 12:01 AM	#6
gugarci Registered User Trader Score: (0) Join Date: Jul 2007 Location: Bergen County, NJ Posts: 197	I'm curious to see if the sporty nature of the gearbox is still there. Please keep posting your over-all experience with the TSB in this thread. How's the DS mode compared to before. I'm not due for service for a while. Thanks for info. __________________ 09 G37S Journey Sedan, Liquid Plat/Graphite, Sport, Prem, Nav, Splash Guards, Bye G35xS

06-30-2009, 10:49 AM	#10
PeterUbers Registered User 2009 Infiniti G37 Trader Score: (0) Join Date: Sep 2003 Posts: 289	GREAT NEWS AND THANK YOU!!! I just made an appt with Lisle Infiniti to have them address the issue and/or apply the TSB. Thanks again -- will give my feedback on the TSB (if applied) after the 12th. __________________ 2008 G35x Prem/Navi \|\| 2009 G37xS Prem/Navi

06-30-2009, 11:26 AM	#11
w0ady Registered User Trader Score: (1) Join Date: Apr 2006 Location: jacksonville, fl Posts: 4,050	definitely getting this asap. __________________ 09 athens 7at g37s coupe 12/22/08; 05 athens 5at g35 coupe r.i.p. 5/13/05-10/29/08

06-29-2009, 11:46 PM	#3
Mike S. Registered User Trader Score: (0) Join Date: Jan 2009 Posts: 205	Did the update seem to cover more than just the 4-3 downshift? It seems like other downshifts are not as smooth too...like just comming to a stop 3-2-1. Then there is the "flare" issue. At any rate..hope to have it done soon.

06-29-2009, 11:53 PM	#5
Mike S. Registered User Trader Score: (0) Join Date: Jan 2009 Posts: 205	Can't wait.

06-30-2009, 01:14 AM	#8
Alex57r Registered User 2009 Infiniti G37 Trader Score: (0) Join Date: Apr 2009 Location: NYC Posts: 361	Very interesting. Will wait to hear more.

06-30-2009, 01:14 AM	#9
hadokenuh Registered User Trader Score: (0) Join Date: Jun 2009 Posts: 80	Great news. Can you do some "spirit" driving tomorrow and let us know if you feel anything different. Thanks!

06-30-2009, 11:32 AM	#12
DarkKnightAZ Registered User Trader Score: (0) Join Date: Jun 2009 Posts: 6	Sweet !! I just got a brand new G37 It has less than 100 miles, do you think they will apply this service thing to it ? Ive notice this happening to me while slowing down. Thanks DK

06-30-2009, 11:59 AM	#13
Triple_X Registered User 2009 Infiniti G37 Trader Score: (3) Join Date: Oct 2008 Location: at work Posts: 2,061	I used to have this problem when there were less than 500 miles on the car. It either went away or I just got so used to it I don't notice anymore. Either way thanks for posting this I'll look into it. __________________ 09 BS G37xCoupe

06-30-2009, 12:41 PM	#14
Mike S. Registered User Trader Score: (0) Join Date: Jan 2009 Posts: 205	My appointment is for the 6th of July, I'll let you guys know my impressions right away.

06-30-2009, 01:23 PM	#15
brynomon Registered User 2009 Infiniti G37 Trader Score: (0) Join Date: Apr 2009 Posts: 129	This morning I did more than spirited driving. I was running late so I really pushed her hard with switching between DS and D mode a few times. DS mode appears to perform better as well when going from 50-20 and then back up to 70. Then when the road opened up I had fun with only a couple of lane changes and quick decel's/accels topping out at around 120. It seems as if the transmission programming changes do in fact make the rest of the shifts better. The performance and driveability of this car now has me floored. I will be interested in other peoples opinions after this update... I must say Fields Infiniti was awesome. They are interested in my feedback on this since I was the first customer with this update and it not only affects the G series but the M and FX's as well. __________________ '09 G37xS 4Dr Liquid Platinum, Prem., Navi., and some wierd cabbie air freshener...

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode