Question for 7AT owners.

Limeybastard · 06-29-2014, 09:53 AM

Ocassionally when I downshift into 4th gear I feel a bump / jolt sensation from floorpan area. Was wondering if you guys ever noticed this?

merkil · 06-29-2014, 10:19 AM

I have never noticed this while downshifting. I have noticed that the 3-4 upshift locks in hard sometimes if you drive aggressively. You can definitely feel that.

Limeybastard · 06-29-2014, 10:27 AM

I should have explained clearer originally, it feels like a bang/thud from underneath car area. It may have to do with the car being finacky about what speed I am at when I downshift to 4th gear.

ZKraken22 · 06-29-2014, 10:56 AM

Never noticed. Guess my car doesn't love me

SouthArk370Z · 06-29-2014, 04:03 PM

Could be a faulty mount but I think you would notice it at other times and not just 5-to-4. Could be incorrect fluid fill level - dealer can check level. My guess is that it's normal - mine will make a harder-than-usual shift every now and then.

JWillis72 · 06-29-2014, 04:52 PM

Mine sees to do it when it downshifts at the same time I touch the gas.

Fountainhead · 06-29-2014, 09:33 PM

I wouldn't use an auto transmission like a manual in the down direction unless I'm dropping from smallest gear to pass. I'm old school but doesn't sound like a good idea. I think I'm just old and the idea of using an automatic transmission to brake with the engine and/or shift like an automatic just feels odd.
I had a 2012 Honda Accord V6 and it had paddle shifters but I just couldn't bring myself to treat it that way, haha.

Malm · 06-29-2014, 09:35 PM

yeah its very unnatural to downshift to brake in the 7at so far. Maybe I still do not have the feel for it. I go out thinking yeah!! im going to use the paddles.. and then forget.

SouthArk370Z · 06-29-2014, 09:44 PM

Quote:

Originally Posted by Fountainhead

I wouldn't use an auto transmission like a manual in the down direction unless I'm dropping from smallest gear to pass. I'm old school but doesn't sound like a good idea. I think I'm just old and the idea of using an automatic transmission to brake with the engine and/or shift like an automatic just feels odd.
I had a 2012 Honda Accord V6 and it had paddle shifters but I just couldn't bring myself to treat it that way, haha.

I know how you feel - using a Turbo 350, TorqueFlite, &c for braking was not a good idea. But, with the TCM playing nanny, I don't think you are going to do much damage unless you get crazy with it (eg, downshifting so RPM go to 6000). It seems to me that this transmission was made to handle downshifting/braking. YMMV

Quote:

Originally Posted by Malm

yeah its very unnatural to downshift to brake in the 7at so far. Maybe I still do not have the feel for it. I go out thinking yeah!! im going to use the paddles.. and then forget.

I seldom think to use the paddles. Old habits are hard to break.

nomodsjk · 06-29-2014, 10:15 PM

I used to get some pretty hard shifts up and down but ever since I overided the tune that came with the Stillen supercharger and replaced it with one from R/T tuning it's shifting like a super car. Also I down shift to brake all the time and haven't had any problems. I think the car is made for it. The only thing that bothers me is when I slow down and down shift sometimes the car drops two gears instead of one due to the sync Rev. This makes the RPM's jump a lot higher than anticipated

Fantastic Z · 06-29-2014, 10:36 PM

I too experience this and so does my neighbor with an G37 coupe. I notice a thud/bang more so in stop-n-go traffic. Right around the 3-4 4-3 shift points. Dealership told me it was normal but, I think different. My bet is on fluid issues.

Jordo! · 06-30-2014, 03:28 AM

You can down shift to match gear to engine and road speed... it was designed for that.

It can be rough, in part, because the ECU rev matches and because you are in full lock up 2 -7, so no soft fluid coupling to make it all feel smooth.

Or, just let it down shift itself.

merkil · 06-30-2014, 08:00 AM

Downshifting in this car is part of what makes it fun to drive I say.

I always downshift when coming to a stop. Just don't shift from 2-1 manually. Let the car do that one on its own.

Sent from my iPhone using Tapatalk

merkil · 06-30-2014, 08:06 AM

Quote:

Originally Posted by Fantastic Z

I too experience this and so does my neighbor with an G37 coupe. I notice a thud/bang more so in stop-n-go traffic. Right around the 3-4 4-3 shift points. Dealership told me it was normal but, I think different. My bet is on fluid issues.

3-4 can lock hard especially if you drive spirited and then take it easy. The ecu kind of learns the driving style and then when you back off it doesn't compensate for it immediately.

I don't mind the hard shifts. I think it's just the nature of the ecu constant adapting to the driving style.

Sent from my iPhone using Tapatalk

Limeybastard · 06-30-2014, 09:40 AM

Yeah, I generally always let the car downshift, but when I do downshift it is down to 3rd gear only and I let the car do the rest.

06-29-2014, 09:53 AM	#1 (permalink)
Limeybastard A True Z Fanatic Join Date: Apr 2014 Location: FL and London UK. Posts: 1,514 Drives: 2014 370Z Sport. Rep Power: 17	Question for 7AT owners. Ocassionally when I downshift into 4th gear I feel a bump / jolt sensation from floorpan area. Was wondering if you guys ever noticed this?

06-29-2014, 10:19 AM	#2 (permalink)
merkil Base Member Join Date: Oct 2013 Location: Brantford, Ontario Posts: 63 Drives: 2011 370z Rep Power: 11	I have never noticed this while downshifting. I have noticed that the 3-4 upshift locks in hard sometimes if you drive aggressively. You can definitely feel that. megalapagas likes this.

06-29-2014, 10:56 AM	#4 (permalink)
ZKraken22 A True Z Fanatic Join Date: Jun 2011 Location: Houston Posts: 1,115 Drives: 10 Nissan 370Z 7AT Rep Power: 15	Never noticed. Guess my car doesn't love me __________________ Litespeed Racing Titanium Cold Air intake// GT Haus Axle// GarageLine combo// Nismo sway bars// Nismo Spoiler // Berk TP's

06-29-2014, 04:03 PM	#5 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	Could be a faulty mount but I think you would notice it at other times and not just 5-to-4. Could be incorrect fluid fill level - dealer can check level. My guess is that it's normal - mine will make a harder-than-usual shift every now and then. Limeybastard likes this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

06-29-2014, 10:36 PM	#11 (permalink)
Fantastic Z Base Member Join Date: Sep 2013 Location: Nashville, TN Age: 34 Posts: 197 Drives: 10' T/S 7AT Rep Power: 11	I too experience this and so does my neighbor with an G37 coupe. I notice a thud/bang more so in stop-n-go traffic. Right around the 3-4 4-3 shift points. Dealership told me it was normal but, I think different. My bet is on fluid issues. __________________ 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

06-29-2014, 10:27 AM	#3 (permalink)
Limeybastard A True Z Fanatic Join Date: Apr 2014 Location: FL and London UK. Posts: 1,514 Drives: 2014 370Z Sport. Rep Power: 17	I should have explained clearer originally, it feels like a bang/thud from underneath car area. It may have to do with the car being finacky about what speed I am at when I downshift to 4th gear.

06-29-2014, 04:52 PM	#6 (permalink)
JWillis72 A True Z Fanatic Join Date: Sep 2013 Location: Fort Myers FL Posts: 2,002 Drives: 2009 370Z yellow 7AT Rep Power: 44	Mine sees to do it when it downshifts at the same time I touch the gas.

06-29-2014, 09:33 PM	#7 (permalink)
Fountainhead Track Member Join Date: Feb 2013 Location: FL Posts: 834 Drives: 2019 Civic Type R Rep Power: 14	I wouldn't use an auto transmission like a manual in the down direction unless I'm dropping from smallest gear to pass. I'm old school but doesn't sound like a good idea. I think I'm just old and the idea of using an automatic transmission to brake with the engine and/or shift like an automatic just feels odd. I had a 2012 Honda Accord V6 and it had paddle shifters but I just couldn't bring myself to treat it that way, haha.

06-29-2014, 09:35 PM	#8 (permalink)
Malm Track Member Join Date: Jan 2014 Location: Palm Bay, Florida Posts: 706 Drives: 11 Nissan 370z bs a7 Rep Power: 12	yeah its very unnatural to downshift to brake in the 7at so far. Maybe I still do not have the feel for it. I go out thinking yeah!! im going to use the paddles.. and then forget.

06-29-2014, 10:15 PM	#10 (permalink)
nomodsjk Premium Member Join Date: Apr 2014 Location: martinsburg wv Posts: 2,073 Drives: 2011 370z MB/7at Rep Power: 19962	I used to get some pretty hard shifts up and down but ever since I overided the tune that came with the Stillen supercharger and replaced it with one from R/T tuning it's shifting like a super car. Also I down shift to brake all the time and haven't had any problems. I think the car is made for it. The only thing that bothers me is when I slow down and down shift sometimes the car drops two gears instead of one due to the sync Rev. This makes the RPM's jump a lot higher than anticipated

06-30-2014, 03:28 AM	#12 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 417	You can down shift to match gear to engine and road speed... it was designed for that. It can be rough, in part, because the ECU rev matches and because you are in full lock up 2 -7, so no soft fluid coupling to make it all feel smooth. Or, just let it down shift itself. __________________ Enjoy it. Destroy it.

06-30-2014, 08:00 AM	#13 (permalink)
merkil Base Member Join Date: Oct 2013 Location: Brantford, Ontario Posts: 63 Drives: 2011 370z Rep Power: 11	Question for 7AT owners. Downshifting in this car is part of what makes it fun to drive I say. I always downshift when coming to a stop. Just don't shift from 2-1 manually. Let the car do that one on its own. Sent from my iPhone using Tapatalk Last edited by merkil; 06-30-2014 at 08:06 AM.

06-30-2014, 09:40 AM	#15 (permalink)
Limeybastard A True Z Fanatic Join Date: Apr 2014 Location: FL and London UK. Posts: 1,514 Drives: 2014 370Z Sport. Rep Power: 17	Yeah, I generally always let the car downshift, but when I do downshift it is down to 3rd gear only and I let the car do the rest.

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