G37 7speed transmission reprogram
#2387
Premier Member
iTrader: (5)
There is no "fix". There are updates that help the "issue". I'll honestly say that during the colder months, my trans shifts a lot better than the warmer months. With that said, this is the exact reason why I'm changing all the fluids and installing a Stillen trans cooler I picked up for a slick deal over black Friday. Should help keep the fluid a bit cooler during the summer months.
Will report back how the fluid change feels. After that, I'll be getting a tune to further help the transmission lag issue.
Will report back how the fluid change feels. After that, I'll be getting a tune to further help the transmission lag issue.
#2388
Premier Member
iTrader: (7)
I've been fairly happy with my trans since the TSB, ECU reset, cleaning the throttle bodies and,installing a grounding kit. That said I'm looking for a tune to get me th wrest of way and am trying to decide whether to go with an etune or to drive to CT for a dyno tune.
Looking forward to feedback on the Stillen trans cooler, if that seems to help I'll go that route as well.
Looking forward to feedback on the Stillen trans cooler, if that seems to help I'll go that route as well.
#2389
I have a used 2011, and have experienced throttle lag in just one place during my driving- The right turn onto a major road. I slow down, glide through the right turn with no throttle, and when I get on the throttle again there's no response and just sat there for maybe 1 to 2 seconds (gives me a "WTF" feeling every single time) and THEN it kicks me in the rump with this rough downshift.
The car is a lease return, and I guess the lease owner wasn't bugged enough to get this issue fixed. Now I'm kind of wondering whether I should fix it or not............... It just happens over and over again on the same turn (though infrequent and kind of random) that it annoys me...
I'm going to a dealer to get a repair on an unrelated problem, and now I'm trying to make up my mind whether to fix or not fix.
Edit: Just saw that I'm not supposed to call this a "fix"... Substitute the word "fix" with "update"
The car is a lease return, and I guess the lease owner wasn't bugged enough to get this issue fixed. Now I'm kind of wondering whether I should fix it or not............... It just happens over and over again on the same turn (though infrequent and kind of random) that it annoys me...
I'm going to a dealer to get a repair on an unrelated problem, and now I'm trying to make up my mind whether to fix or not fix.
Edit: Just saw that I'm not supposed to call this a "fix"... Substitute the word "fix" with "update"
Last edited by pixie; 01-28-2015 at 06:06 PM.
#2390
Registered Member
Get it! The difference it made on my car was worth paying for. It was done under warranty, but I would have paid for it. I did not like what the update to DS mode though.
#2391
#2393
Registered Member
#2395
On second thought... I think I'll just live with that lag. I use DS quite a bit in heavy freeway traffic and it sounds like the reprogram would take away part of the engine braking. I have a bad right ankle, and heavy traffic can literally be a pain without engine braking.
#2396
We are on the same page, which is why I am questioning the exact behaviour of this flash. I have no problems with the 2009 programming overall, but do like the smoother shifting of the 2012. Unfortunately, Infiniti chose not to just fix the rough shifting and hesitation, but to also take away good features of the tranny programming while they were at it. But that's compared to our original 2009. Those who already "updated" got more problems, so they have no choice but to get this latest one.
I had the tsb done and most of the lag is gone. It is like a different car.
#2397
Registered User
I'll add my two cents here.
I've owned the G37S for about 4 months coming out of a G35 coupe 6MT. The throttle was, needless to say, frustrating beyond belief. Downshifts were jerky, it never felt like it was in the right gear, and throttle response felt completely disconnected. Finally took it into the dealership this morning and told them what was going on (did not mention the TSB). I had a few other things for them to take care of under warranty, so I grabbed a Q70 as a loaner and went to work. I stopped back in tonight to pick it up, and (I know this is getting cliche) it feels like a COMPLETELY different car. I cannot believe how great it drives now - not a subtle change by any means. Shifts are smoother, downshifts no longer make you wonder if you're going to hit the guy in front of you, and the throttle response feels like they connected a throttle cable. I am completely blown away at how much of an improvement this makes. Why this wasn't the program from the factory is beyond me. For those wondering, my work order states "CK rough on downshift: reprogrammed TCM and ECM" If you haven't had this done, I cannot imagine why you wouldn't want to. Again, this isn't so much of an improvement as it is a complete overhaul of the throttle and transmission. It makes a huge difference.
As a side note, I did not enjoy the Q70. It felt extremely heavy, and handled poorly. Acceleration was fine, but beyond that it is a huge downgrade (with some more cool features) from my newly revived G37S.
I've owned the G37S for about 4 months coming out of a G35 coupe 6MT. The throttle was, needless to say, frustrating beyond belief. Downshifts were jerky, it never felt like it was in the right gear, and throttle response felt completely disconnected. Finally took it into the dealership this morning and told them what was going on (did not mention the TSB). I had a few other things for them to take care of under warranty, so I grabbed a Q70 as a loaner and went to work. I stopped back in tonight to pick it up, and (I know this is getting cliche) it feels like a COMPLETELY different car. I cannot believe how great it drives now - not a subtle change by any means. Shifts are smoother, downshifts no longer make you wonder if you're going to hit the guy in front of you, and the throttle response feels like they connected a throttle cable. I am completely blown away at how much of an improvement this makes. Why this wasn't the program from the factory is beyond me. For those wondering, my work order states "CK rough on downshift: reprogrammed TCM and ECM" If you haven't had this done, I cannot imagine why you wouldn't want to. Again, this isn't so much of an improvement as it is a complete overhaul of the throttle and transmission. It makes a huge difference.
As a side note, I did not enjoy the Q70. It felt extremely heavy, and handled poorly. Acceleration was fine, but beyond that it is a huge downgrade (with some more cool features) from my newly revived G37S.
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Bravo at (04-19-2015)
#2398
I'll add my two cents here.
I've owned the G37S for about 4 months coming out of a G35 coupe 6MT. The throttle was, needless to say, frustrating beyond belief. Downshifts were jerky, it never felt like it was in the right gear, and throttle response felt completely disconnected. Finally took it into the dealership this morning and told them what was going on (did not mention the TSB). I had a few other things for them to take care of under warranty, so I grabbed a Q70 as a loaner and went to work. I stopped back in tonight to pick it up, and (I know this is getting cliche) it feels like a COMPLETELY different car. I cannot believe how great it drives now - not a subtle change by any means. Shifts are smoother, downshifts no longer make you wonder if you're going to hit the guy in front of you, and the throttle response feels like they connected a throttle cable. I am completely blown away at how much of an improvement this makes. Why this wasn't the program from the factory is beyond me. For those wondering, my work order states "CK rough on downshift: reprogrammed TCM and ECM" If you haven't had this done, I cannot imagine why you wouldn't want to. Again, this isn't so much of an improvement as it is a complete overhaul of the throttle and transmission. It makes a huge difference.
As a side note, I did not enjoy the Q70. It felt extremely heavy, and handled poorly. Acceleration was fine, but beyond that it is a huge downgrade (with some more cool features) from my newly revived G37S.
I've owned the G37S for about 4 months coming out of a G35 coupe 6MT. The throttle was, needless to say, frustrating beyond belief. Downshifts were jerky, it never felt like it was in the right gear, and throttle response felt completely disconnected. Finally took it into the dealership this morning and told them what was going on (did not mention the TSB). I had a few other things for them to take care of under warranty, so I grabbed a Q70 as a loaner and went to work. I stopped back in tonight to pick it up, and (I know this is getting cliche) it feels like a COMPLETELY different car. I cannot believe how great it drives now - not a subtle change by any means. Shifts are smoother, downshifts no longer make you wonder if you're going to hit the guy in front of you, and the throttle response feels like they connected a throttle cable. I am completely blown away at how much of an improvement this makes. Why this wasn't the program from the factory is beyond me. For those wondering, my work order states "CK rough on downshift: reprogrammed TCM and ECM" If you haven't had this done, I cannot imagine why you wouldn't want to. Again, this isn't so much of an improvement as it is a complete overhaul of the throttle and transmission. It makes a huge difference.
As a side note, I did not enjoy the Q70. It felt extremely heavy, and handled poorly. Acceleration was fine, but beyond that it is a huge downgrade (with some more cool features) from my newly revived G37S.
#2399
Registered User
Does the vehicle need to be of certain age or under warranty to get the TCM reprogrammed and/or is there a fee for this? If have an '09 g37x. I'm definitely experiencing the rough down shifts and would like to get it fixed as I've wondered if I might rear-end someone as you noted. Thanks
#2400
So last month I went to the dealership complaing about some transsmion issues like harsh downshifting and lag. When got the car back the paper work reads ITB10-075A COMPLETE. I have a g37x coupe 2009 that I just bought 2 months ago so I don't know what have been done previously. Also, I read most of the comments here so I know that the ITB10-075A is one of the earliest correction was made by infinite and there is a newer one IT12-027D. The reason why I'm saying that is After the update, the harsh downshifting still exists and couple of days ago and noticed harsh up shifting as well (it is like the car shakes a little when up shifts) which is so annoying. I really don't know what to do I love the car but the transsmion keeps freakin me out what I need to know is does applying ITB10-075A means that the newer ones doesn't apply to my car or should try another dealer?