More "possible" 7AT issues

Fantastic Z · 03-13-2014, 07:30 PM

Hey there!
I'll try and be quick with this. I'm aware of the common issues with the 7AT mentioned throughout this forum and I have done a fair amount of research. I believe that I too am starting to experience these issues now that my new job has me working downtown in A LOT more stop and go traffic.

The trans is VERY jumpy and pops at low speeds. Today when it shifted (while in D) from 2nd to 1st if plopped down a gear and felt as if the car was in neutral. I went back on the throttle it revved to about 1k and lurched forward.
I believe this is cause for concern. I will be stopping by the Nissan dealership after work tomorrow and will hopefully get this sorted out peacefully.

I would appreciate other 7AT users input. Seems many of you report issues but, never report back with cost, time spent, actual problem etc...

megalapagas · 03-13-2014, 07:38 PM

I haven't had that issue man and I'm almost at 75k miles on mine 2010/7AT/Youring sport package.....and I do Spirted driving aswell as OCASIONAL drag runs...

agoodcar · 03-13-2014, 07:38 PM

i live in chicago and in the cold usually at low speeds going from 1st to 2nd it kicks and sometimes i look around like someone rear ended me or something

it happens when slowing to a stop also it will jerk like the car was hit by someone

i haven't tried to change tranny fluid i'd probably start there if anyone has suggestions would like to hear
i did not notice this issue in summer but this was only my first 6 mo with car and it has only 17k miles

Fantastic Z · 03-13-2014, 07:51 PM

Only 34k on my Z and I tend to notice more rough shifts (downshift) once everything has warmed up. In my experience that is a sign of fluid issues or breakdown since it loses it's viscosity.

Fantastic Z · 03-13-2014, 07:54 PM

Quote:

Originally Posted by agoodcar

i live in chicago and in the cold usually at low speeds going from 1st to 2nd it kicks and sometimes i look around like someone rear ended me or something

it happens when slowing to a stop also it will jerk like the car was hit by someone

i haven't tried to change tranny fluid i'd probably start there if anyone has suggestions would like to hear
i did not notice this issue in summer but this was only my first 6 mo with car and it has only 17k miles

haha yeah I too think I've gotten rear ended with how bad it jerked. First time I REALLY noticed it, I actually got out of my car

NOT COOL!

Jordo! · 03-13-2014, 08:14 PM

Once in a blue it will at a bit quirky with a sudden rough down shift, especially after driving around an shifting manually then going back to D (there is some sort of learning trim on gear shifting).

The trans is probably fine, although if you are over 34K, you are about due to have the diff fluid changed.

Fantastic Z · 03-13-2014, 08:20 PM

Quote:

Originally Posted by Jordo!

Once in a blue it will at a bit quirky with a sudden rough down shift, especially after driving around an shifting manually then going back to D (there is some sort of learning trim on gear shifting).

The trans is probably fine, although if you are over 34K, you are about due to have the diff fluid changed.

I actually have a practically new VLSD from a sport model (less than 4k on it) in my basement waiting to be installed. Redline fluid, Whitleline bushings and new hardware.

SouthArk370Z · 03-13-2014, 08:27 PM

Sounds a lot like what an older automatic would do if low on fluid - slip when RPM are low and then "catch" when RPM increase enough for the pump to start working again. Newer autos are similar enough to the older ones that I'd get the level checked. At 34K on the odometer, it might be a good idea to go ahead and have the trans fluid changed.

megalapagas · 03-13-2014, 09:33 PM

So I'm at 74k miles....I'm scheduling a tranny fluid change at the dealer....would a Diff fluid also be of need?? Its a noob question but better ask than qonder "What If?"...

RoadsterST · 03-13-2014, 10:18 PM

Ask them to check for TCM updates. Mine does it occasionally but it seems to be trying to downshift at too high a RPM. Normally is when I go from manual to auto it will do it the first time I come to a complete stop.

Sent while driving!

N0SL3N · 03-13-2014, 10:35 PM

Quote:

Originally Posted by megalapagas

So I'm at 74k miles....I'm scheduling a tranny fluid change at the dealer....would a Diff fluid also be of need?? Its a noob question but better ask than qonder "What If?"...

If you haven't changed your diff fluid yet, you are going to want to get that done. Preferably with Redline 75w90.

blueranger · 03-13-2014, 11:07 PM

I'm about 28k and really like to drive in manual mode most of the time and do notice a little jerk when downshifting from 2nd to first when I switch back to auto mode.

RoadsterST · 03-13-2014, 11:12 PM

Quote:

Originally Posted by blueranger

I'm about 28k and really like to drive in manual mode most of the time and do notice a little jerk when downshifting from 2nd to first when I switch back to auto mode.

Honestly think its just the computer picking back up where you left it.

Sent while driving!

Felix 808 · 03-14-2014, 01:54 AM

Quote:

Originally Posted by Fantastic Z

I actually have a practically new VLSD from a sport model (less than 4k on it) in my basement waiting to be installed. Redline fluid, Whitleline bushings and new hardware.

Hey that looks familiar

Fantastic Z · 03-14-2014, 08:47 PM

Quote:

Originally Posted by Felix 808

Hey that looks familiar

Well I stopped by the dealership after work and they were swamped and couldn't take me in until Monday

Today a new issue popped up. While in my usual stop and go traffic shortly after the car upshifts into 3rd. It will do so VERY slowly while at speed and the RPMs drop to around 1,100 and when I begin to throttle up they somewhat bounce around (+/- a few 100 rpm) and finally is calms down and I go about my way.
WTF man

03-13-2014, 07:30 PM	#1 (permalink)
Fantastic Z Base Member Join Date: Sep 2013 Location: Nashville, TN Age: 35 Posts: 197 Drives: 10' T/S 7AT Rep Power: 12	More "possible" 7AT issues Hey there! I'll try and be quick with this. I'm aware of the common issues with the 7AT mentioned throughout this forum and I have done a fair amount of research. I believe that I too am starting to experience these issues now that my new job has me working downtown in A LOT more stop and go traffic. The trans is VERY jumpy and pops at low speeds. Today when it shifted (while in D) from 2nd to 1st if plopped down a gear and felt as if the car was in neutral. I went back on the throttle it revved to about 1k and lurched forward. I believe this is cause for concern. I will be stopping by the Nissan dealership after work tomorrow and will hopefully get this sorted out peacefully. I would appreciate other 7AT users input. Seems many of you report issues but, never report back with cost, time spent, actual problem etc... __________________ Rays GramLights 57Fxx BM w/red centers-Michelin Pilot Sport tires-Motordyne CBE-Nismo red calipers-Z1 (SS lines/Slotted rotors)-Motul fluids-Whiteline diff bushings-Redline fluids-JDM fog lamp-GTR start button-Optima Yellow Top-EVO-R B pillars-Custom GPS mount

03-13-2014, 07:38 PM	#2 (permalink)
megalapagas Enthusiast Member Join Date: May 2013 Location: McAllen,TX Posts: 457 Drives: '10 370Z Tour A/T Rep Power: 12	I haven't had that issue man and I'm almost at 75k miles on mine 2010/7AT/Youring sport package.....and I do Spirted driving aswell as OCASIONAL drag runs... __________________ GTM 34 Row Oil Cooler \| K&N Drop Ins w/ Z1's Post MAF Tubes \| F.I Non-Res'd 2.5" T.P w/ CF CBE \| Axis Wheels \| Piecing together My Own Custom T4 Top Mount Single Turbo Kit Still in the works \|

03-13-2014, 07:51 PM	#4 (permalink)
Fantastic Z Base Member Join Date: Sep 2013 Location: Nashville, TN Age: 35 Posts: 197 Drives: 10' T/S 7AT Rep Power: 12	Only 34k on my Z and I tend to notice more rough shifts (downshift) once everything has warmed up. In my experience that is a sign of fluid issues or breakdown since it loses it's viscosity. __________________ Rays GramLights 57Fxx BM w/red centers-Michelin Pilot Sport tires-Motordyne CBE-Nismo red calipers-Z1 (SS lines/Slotted rotors)-Motul fluids-Whiteline diff bushings-Redline fluids-JDM fog lamp-GTR start button-Optima Yellow Top-EVO-R B pillars-Custom GPS mount

03-13-2014, 08:14 PM	#6 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	Once in a blue it will at a bit quirky with a sudden rough down shift, especially after driving around an shifting manually then going back to D (there is some sort of learning trim on gear shifting). The trans is probably fine, although if you are over 34K, you are about due to have the diff fluid changed. __________________ Enjoy it. Destroy it.

03-13-2014, 08:27 PM	#8 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Sounds a lot like what an older automatic would do if low on fluid - slip when RPM are low and then "catch" when RPM increase enough for the pump to start working again. Newer autos are similar enough to the older ones that I'd get the level checked. At 34K on the odometer, it might be a good idea to go ahead and have the trans fluid changed. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

03-13-2014, 07:38 PM	#3 (permalink)
agoodcar Base Member Join Date: Aug 2013 Location: chicago, IL Posts: 13 Drives: 370z touring Rep Power: 12	i live in chicago and in the cold usually at low speeds going from 1st to 2nd it kicks and sometimes i look around like someone rear ended me or something it happens when slowing to a stop also it will jerk like the car was hit by someone i haven't tried to change tranny fluid i'd probably start there if anyone has suggestions would like to hear i did not notice this issue in summer but this was only my first 6 mo with car and it has only 17k miles

03-13-2014, 09:33 PM	#9 (permalink)
megalapagas Enthusiast Member Join Date: May 2013 Location: McAllen,TX Posts: 457 Drives: '10 370Z Tour A/T Rep Power: 12	So I'm at 74k miles....I'm scheduling a tranny fluid change at the dealer....would a Diff fluid also be of need?? Its a noob question but better ask than qonder "What If?"... __________________ GTM 34 Row Oil Cooler \| K&N Drop Ins w/ Z1's Post MAF Tubes \| F.I Non-Res'd 2.5" T.P w/ CF CBE \| Axis Wheels \| Piecing together My Own Custom T4 Top Mount Single Turbo Kit Still in the works \|

03-13-2014, 10:18 PM	#10 (permalink)
RoadsterST Enthusiast Member Join Date: Nov 2013 Location: Wylie, TX Posts: 446 Drives: 2013 roadster ST Rep Power: 13	Ask them to check for TCM updates. Mine does it occasionally but it seems to be trying to downshift at too high a RPM. Normally is when I go from manual to auto it will do it the first time I come to a complete stop. Sent while driving!

03-13-2014, 11:07 PM	#12 (permalink)
blueranger Track Member Join Date: Aug 2012 Location: Albuquerque NM Posts: 577 Drives: 2010 Roadster 7AT Rep Power: 307	I'm about 28k and really like to drive in manual mode most of the time and do notice a little jerk when downshifting from 2nd to first when I switch back to auto mode. __________________ F.I. Stage 1 Twin Turbo #48 \| E85 FlexFuel \| Built 7AT \| F.I. 34 Row Oil Cooler \| F.I. Flex Plate \| F.I. 19 row Trans Cooler \| MT ET Street S/S \| ECUTEK Tuned by Seb \| RPM Roll Bar

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