Transmission lag delay

[Mfinesse]

Can anyone confirm if the tsb actually fixes this issue? If not is there a outside 3rd party ecu tune that fixes this ? The transmission has a delay in shift, it feela like its at the 4th gear range.

I

[Ilya]

Bumping this thread. Can anyone confirm for Mfinesse?

[Frog]

I would get the lag when I was riding in echo mode. I have the dealer apply the service bulletin and also I quit driving an echo mode haven't had it since. Which one fix the problem who knows, but I believe most of it has to do with not driving in echo mode,



What mode where you driving in when the lag took place.

After the service bulletin update it did change the idling behavior of the transmission and engine. I don't like it as well

[Ilya]

I get a bit of a lag especially on WOT takeoff no matter what mode I'm in. Or when I'm trying to make a turn at an intersection and beating traffic (I think in this situation it might be the VDC or something looking at the steering wheel angle and gas input and saying NOPE, you're going to spin out). Stupid nanny. It's annoying as hell. If I mash the gas, I WANT TO TAKE OFF!

Have yet to go to the dealer, etc.

[Mfinesse]

Yeah this was the deal breaker for me. I was about to purchase a used high mileage 2011 but the transmission was a big disappointment, especially coming from a Lexus.

sad part is infiniti doesn't have a fix for this and it's supposed to be "normal". Even the software update does not fix this. Can't imagine a 55k dollar car with a transmission that feels as horrible as this.

[mazz]

thanks for telling me the "transmission that feels as horrible as this" i have over 20k on a 2013 and don't have that problem. But i am sure you can deal in absolutes after a 3 block test drive.
Mazz

[Ilya]

transmission, technically speaking, is fine. It's actually quite nice on sporty downshifts when driving at a brisk pace (rev matching). The issue is, for some reason, on acceleration. Some days mine just feels downright sluggish. When I get back to my regular place of residence from where I live now, I'm definitely going to bring it to the dealer and keep bringing it to them until they fix t.

Like I said, it's dangerous. Trying to get out of a sticky situation, sometimes there is a MAJOR delay before the car takes off. Sometimes, especially when in M mode, if you give it gas and then let off slightly and feather the gas, the car will jerk back and forth (HIGH RPM) due to throttle being EXTREMELY touchy.

This car is great, I'd buy it again in a heart beat...but it certainly needs to have Infiniti's engineers fix some of the software related bugs like shift points, etc.

[AlphaSnacks]

I have noticed that the poor behavior of my transmission becomes very apparent when it's very hot outside. If the weather is below 85, the car drives great - especially when the sun is gone. When it's hot, the trans gets very hot as well and I'm willing to bet the trans fluid isn't coping well and that causes a line pressure issue with the torque converter, which causes significant lag. It drives me crazy sometimes. For that reason, I usually drive in manual mode using the paddles because the throttle response is just not what I want it to be.

Also, Frog: it's eco (economy) mode. Not echo.

[Ilya]

I have noticed that the poor behavior of my transmission becomes very apparent when it's very hot outside. If the weather is below 85, the car drives great - especially when the sun is gone. When it's hot, the trans gets very hot as well and I'm willing to bet the trans fluid isn't coping well and that causes a line pressure issue with the torque converter, which causes significant lag. It drives me crazy sometimes. For that reason, I usually drive in manual mode using the paddles because the throttle response is just not what I want it to be.

Also, Frog: it's eco (economy) mode. Not echo.

This. I noticed this too. I'm in M 90% of the time. I've gone into N (when I was in D thinking I was in M) a few times lol.

[AlphaSnacks]

Fortunately my car has paddle shifters, so I avoid that. LOL

But also, it's possible that the lag can be a byproduct of a heatsoaked MAF sensor causing readings and voltage to be all wonky, and killing throttle response as a result.

[Ilya]

I have the OBDII bluetooth connect and Torque app on my phone. Perhaps, if I remember, I'll look at some of the readings to see if there is a major discrepancy. What particular ones do you think I'd need to look at?

[M37rinh]

i tried getting the "update" but my car apparently was up to date....honestly when i installed my tadeka intake that helped get ride of alot of the lag

[1GR8M56S]

I've been having the same issues, it seems sometimes as if it shifts premature, what's the update you guys are speaking of?

[icrf]

I'm assuming this is the update:

Subject: SB 2011-2012 M37; Shift Responsiveness Issues
Summary of ITB12021:
IF YOU CONFIRM One or more of the following conditions: Harsher than expected down shifts when coasting to a stop. Hesitation/lag when accelerating after coasting. Hesitation/lag or harsher than expected down shifts when coming to a stop and accelerating again (rolling stop). Engine rev matching during moderate to heavy braking.
ACTION 1. Refer to step 6 in the SERVICE PROCEDURE to confirm this bulletin applies to the vehicle you are working on.
2. If this bulletin applies, reprogram the ECM and TCM. See this bulletin for further detail.

I had it applied recently, as what I noticed more than anything was the harsh downshift when coasting to a stop. I feel like it helped immediately after, but within a few days, I don't know that anything is better. Now I'm thinking of blaming the learning aspect of the transmission. Something about my driving style makes it stupid. Does anyone know if it can be reset to default and then have learning disabled? I want to learn the transmission, I don't want it to learn me.

When it comes to lag during downshifts at speed, it's surprisingly slow, and the funny part is it's slow enough to see the thought process. Cruise at 45 in high gear, then drop the pedal to the floor. First revs get a little high, like a torque converter unlocks, then one downshift, then a second downshift, and the car starts moving like it should. The whole process takes at least a second and each step is clearly visible. Haven't really paid much attention to shift speed in manual mode, though I do use it occasionally.