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Transmission Failure Registry

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#83 · (Edited by Moderator)
Church said:
CBA
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To be honest, Mizuno San alluded to this. When asked why Nissan would not install later LC logic on earlier cars, he mentioned something about drivetrain strength. His comment was moderately disregarded in the community as "the company line". I sleep a little better with LC5+ on my car, Since I have a DBA transmission, courtesy of Nissan, but have pondered it from time to time. Sorry for clogging up the thread with my thoughts. I also had nothing other than LC2 on my CBA transmission like you. We'll see what happens, but at least the forks are replaceable with a better Dodson part.

Shawn
 
#84 · (Edited by Moderator)
shawnhayes said:
To be honest, Mizuno San alluded to this. When asked why Nissan would not install later LC logic on earlier cars, he mentioned something about drivetrain strength. His comment was moderately disregarded in the community as "the company line". I sleep a little better with LC5+ on my car, Since I have a DBA transmission, courtesy of Nissan, but have pondered it from time to time. Sorry for clogging up the thread with my thoughts. I also had nothing other than LC2 on my CBA transmission like you. We'll see what happens, but at least the forks are replaceable with a better Dodson part.

Shawn
Click to expand...
When I had LC5/6 loaded up and in R mode the car shifted HARD at redline. My friends cars also shift hard so it's not just my GT-R. With LC2 the shifts are soft even in R mode.

I went to the drag strip the other night and tested LC5 vs LC2 back to back. I lost at least 1mph and 1.5 tenths running LC2. It's definitely easier on the trans but the car is slower.

I would be willing to run LC5 down the strip in non R mode (for the trans) but it won't let me launch.

Personally, I'm sticking with LC2 from here on out. I'll just have to deal with the rough 1-2 shift and the clunky starts and sounds.
 
#85 ·
I have to say this is not my experience in my CBA with DBA trans. Maybe the newer trans have a different servo behavior, making the lc5 work on the DBA. I knoweth not surely.

Shawn
 
#86 ·
To be honest, I am not a die hard GTR fan "yet",
Coming from Egear tranny on Lambo, this Nissan transmission feels wayyyyy better even with LC2 on CBA trans (MY2010).
I loaded LC5, and it was night and day difference and I am going to stick with that.
 
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#88 ·
fcs1965 said:
Mine failed last week. what is the difference between cba and dba transmissions
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If you've had any type of transmission failure (including differential, AWD unit, gears, internal sensors/clips/etc), sign in.

Please provide:

Model Year (US Assumed, Specify if global)
Relevant ECM/TCM Code(s)
Symptoms of failure
Approx ODO at time of failure
What were you doing at time of failure
Mods at time of failure (Specifically: Reflash ECM? Reflashed TCM?)
Track use pre-failure (miles or XX minute sessions or track days, # launches on lc version X, etc)
Warranty filed? Date (mm/yy) Approved?
Any thread links or other notes you might have
 
#91 ·
K-MAN said:
Model Year (US Assumed, Specify if global) 2010
Relevant ECM/TCM Code(s) P0845
Symptoms of failure Lost 1,3,5 and R
Approx ODO at time of failure 31000 miles
What were you doing at time of failure driving at 55 mph on the highway
Mods at time of failure (Specifically: Reflash ECM? Reflashed TCM?) ECM/TCM Cobb 006. Injectors/Tune/E85/Downpipes/Exhaust/intakes 3 inch/285/30/20 squared.
Track use pre-failure (miles or XX minute sessions or track days, # launches on lc version X, etc) 10 track days
Warranty filed? Date (mm/yy) Approved? Feb 25th 2012 Approved.
Any thread links or other notes you might have None.

They changed it out with a brand new 2012 Trans. Took 10 days from start to finish and was given a rental car.
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What the hell. I had the same cobb code, with only cobb ap and got denied. This is grounds for discrimination ?
 
#92 ·
I am most curious to see how many of these that were running cobb - what boost levels were you running?

I'm running 18psi at peak, and that seems to be the magic number. It was rejected for "overboosting" - but many others seem to be accepted.
 
#93 · (Edited by Moderator)
Model Year (US Assumed, Specify if global) 09 gtr
Relevant ECM/TCM Code(s) po797 , p2715
Symptoms of failure none
Approx ODO at time of failure 56000
What were you doing at time of failure starting the car in the morning
Mods at time of failure stock
Track use pre-failure
Warranty filed? Date (mm/yy) Approved? car just left on the flat bed Ill post anything I find out tommorrow
Any thread links or other notes you might have
warranty was approved today the count down is on hopefully it wont be too much more than a week
 
#94 ·
bac12476 said:
Model Year (US Assumed, Specify if global) 09 gtr
Relevant ECM/TCM Code(s) po797 , p2715
Symptoms of failure none
Approx ODO at time of failure 56000
What were you doing at time of failure starting the car in the morning
Mods at time of failure stock
Track use pre-failure
Warranty filed? Date (mm/yy) Approved? car just left on the flat bed Ill post anything I find out tommorrow
Any thread links or other notes you might have
Click to expand...
weird,what does that code mean?
 
#95 ·
I thought I indicated on my post the word stock? Yes the dealer replaced it with a 2012 unit after that we did the e 85 mods.
 
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#96 ·
Im now wating for an answer back from nissan north amercia on there decision . the tech sayes his oppnion is to replace the transmission.... to all the people who got new transmssions , How long did it take for gtr transmission to be replaced? ive owned my car for 15 days it sucks to lose it for weeks so soon ..
 
#97 ·
bac12476 said:
Im now wating for an answer back from nissan north amercia on there decision . the tech sayes his oppnion is to replace the transmission.... to all the people who got new transmssions , How long did it take for gtr transmission to be replaced? ive owned my car for 15 days it sucks to lose it for weeks so soon ..
Click to expand...
Sorry to hear about your misfortune. My failure likewise happened early in my ownership, ~45 days after ownership. My replacement took a little over 3 weeks from start to finish. Of course this was last year, when lots of parts, including the transmission, were hard to find in America due to manufacturing and supply issues in Japan from both the tsunami and nuclear reactor events.
 
#100 ·
Second transmission failure:

Painful to be on the list

Model Year
USMY 2009

Relevant ECM/TCM Code(s)
p2715

Symptoms of failure
transmission went to auto mode, Even gears only, no reverse available, Check Engine Light, and Drivetrain Light

Approx ODO at time of failure
30000

What were you doing at time of failure
Second track day of the weekend at VIR with TrackDaze, at the second to last session of the second day

Mods at time of failure
Forged Performance road course tune
Replacement 2012 transmission
Forged Performance tranny build: http://www.gtrlife.com/forums/topic/31195-shawn-hayes-gt-r-maintainance-thread/page__st__300#entry908609
Greddy transmission cooler
Cobb catted midpipe, Agency Power Variable Exhaust
WillAll Differential cooler with custom Forged Performance plumbing

Track use pre-failure
Four years of approx six track weekends per year (approx 36 track days, average four sessions per day)

Warranty filed? Date (mm/yy) Approved?
Due to significantly modified 2012 transmission because of my lack of faith due to the FIRST failed transmission, we did not even try (failed sensor was a Dodson part)

Any thread links or other notes you might have
First failure:
http://www.gtrlife.com/forums/topic/67876-transmission-failure-registry/#entry872652

Rebuild experience:
http://www.gtrlife.com/forums/topic/88143-my-experience-with-forged-performance/

Shawn
 
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