Last post on Sep 23, 2013 at 6:23 AM
You are in the Infiniti M37 M56
What is this discussion about?
Infiniti M37, Sedan
#128 of 195 Re: Quirky Transmission [bienster]
May 24, 2011 (10:48 am)
wildfire, I just noticed this M37 / M56 Thread while I was perusing MyG37.com Forum. One member directed me here because I am so disgusted with my 2010 G37X with the Herky-Jerkiness, lagging & hesitation for almost 1 year, since I leased it. I am in the midst of trying trade Out of my lease - I am working with Infiniti of NA rep who has followed up on my complaint filed through the Infiniti Web Site and also persuing with the Service Manager at my dealership. I am seriously entertaining Swapping Out for CPO 08 or 09 M35X (not sure if they had a M37X in 09), which had the 5 AT. That's the same tranny that was in my 2007 G35X. Sooooooooooo much better, yes the 7AT gets better mpgs, but at huge sacrifice of performance. I see from this thread alone, that there are many 2010/2011 M 37 complaints about the same thing: This crappy 7 speed Auto Tranny..
#129 of 195 Re: Quirky Transmission [almatti]
May 24, 2011 (11:19 am)
I am so disgusted with my 2010 G37X with the Herky-Jerkiness, lagging & hesitation for almost 1 year, since I leased it
Did you do the transmission reflash for 10 G37? I have a 2010 G37 coupe as well as a 11 M37.. And we did the reflash for both cars a couple days apart.. I give the G37 reflash a 10 out of 10.. it is very smooth and powerful now...
#130 of 195 Re: Quirky Transmission [almatti]
May 24, 2011 (1:21 pm)
There have b een two different re-programs for the TCM and one for ECM. The second re-program on the TCM finally did the trick. It's almost a normal car now; just a drop finicky when first started. Living in southern Florida, it warms up within one half mile and is actually acceptable. The big question is whether the fix that worked on my M-37 will work on your G-37. If it does, it should basically end the herky-jerkies and you should live in blissful contentment. Good luck!
#132 of 195 M37 unsafe on interstates (IMHO)
May 25, 2011 (10:01 am)
I am getting the transmission "fix" on Thursday...but yesterday I found myself doing 70 on the interstate with a truck barrelling down on me from the rear. I pushed the gas about 3/4 of the way down to accelerate into the passing lane and the car....SLOWED DOWN. First there was a second or two of a pause while the car found the lower gear...then a jerk and the engine suddenly raced to about 6000 RPM....which I suspect is above the power band. Hearing the engine race like that I let up on the gas a little and engine braking started. It was both ugly, scary and dangerous.
I am already shopping for it's replacement because the cost is almost zero to get out of the lease....or I might just go the lemon law route since I reported the problem in Dec. (and my dealer said he couldn't recreate it....ha!)
Hopefully the fix will stop this from happening or Infiniti should consider a safety recall of the 2011 M37's before someone is killed.
#133 of 195 improved a bit
May 26, 2011 (3:56 pm)
The fix definately improved shifting a bit. I'm running in sports mode now and it seems to be better. I took the car on the interstate....ran it up to 70mph and then pushed the accelerator almost to the floor. The same drop in power as the transmission decided what to do..and then rev'd to 6K....kept in that gear for a very short while and then upshifted and accelerated. So the problem is still there....if you want to do any evasive maneuvering on an interstate, get a different car.
I'm going to cut my m37 lease and buy my way out for $1000 after 1 year of driving. I just don't like the car enough to keep it...and for $1000 it's not worth keeping it.
#134 of 195 Re: improved a bit [ghstudio]
May 27, 2011 (5:57 am)
I have an M56 and just had the new ECM/TCM s/w updates installed. It definitely fixed the hesitation when at a complete stop, but I agree there is still a bit of hesitation before it downshifts when driving at higher speeds. ...Strange that it's taking Infiniti this long to fine tune the transmission s/w, but I don't believe it's as bad as you make it out to be... I'm not sure I'd call it a safety hazzard. I think it's fairly minor and I can live with it until a newer update comes out. Hopefully someone will post the update when it's released...
#135 of 195 M37: Much improved, with a few issues
Jul 06, 2011 (12:01 pm)
After having a pair of M35s, the M37 is markedly better. More powerful, better gas mileage, improved styling. BUT there are a few issues. First, on occasion, there is a noticeable clunk from the transmission when coming to a stop. That's relatively minor. Second, the Bluetooth system is an abomination. The Bluetooth works just fine, but what it takes to place a simple phone call is mind-boggling. Choices upon choices upon choices. It would be nice to speak the digits and do no more. Some mad person, however, designed a system that can only be described as Byzantine. Third, the sensor for the outside temperature is incredibly slow. It typically takes a half hour of more before the reading is at all accurate. I mentioned this to my dealer who compared my car to another and said they were the same. Yes, they both are terrible. I had the same problem on my earlier Ms. Still, a very good car with a few problems that seem eminently fixable.
#136 of 195 Agree with nrwayne!
Jul 07, 2011 (7:22 am)
I like my M35 NAV much better! Just tell it to dial a certain number or name and , Viola!
Outside temp was better on that car as well...
I also think that this car has a lot of road noise...as was the M35...Otherwise it is a GREAT car!
#137 of 195 Re: Mostly agree with topgun7 [jck4u]
Jul 10, 2011 (4:14 pm)
I just purchased a fully loaded M37x and have driven it for approximately 1300 miles. I have experienced all the transmission issues expressed in the other message threads. I stopped in to see the General Manager at the dealership this afternoon and he said there have been no problems like mine reported to him - HARD TO BELIEVE given the threads in this blog.
I plan to take the vehicle in and request the remapping or software patch or whatever it takes to solve the problem. I was driving a Camry for 14 years before driving this new Infinity and never had any problems like this. I am extremely disappointed.