Automatic 2-1 rough downshifting

ninous26 · 11-03-2010, 02:12 PM

This is normal. The tranny in my AT G does this and its annoying.. I have confirmed this with other people in the G world..

You should see what happens when you're rolling around 5 mph in 2nd then tap it into first lol. When I do that some electronic module thing starts going off and makes a "t-rrrrr" zipping sound for a split second then there is a plusing sound.. This all happens very quick but all normal.

Edit: Just to be clear. Yes my car has a violent jerky shaky down shift in "D" coming from 2-1 when going slow.. The triptronic thing is just as bad. Normal.

c41006 · 11-03-2010, 04:02 PM

Mine does this sometimes in D

JACKPAC · 11-03-2010, 04:35 PM

It's normal for some jerkiness while in M mode. The "auto" downshift in M is at a low RPM as others have mentioned. It's not normal to jerk in pure D mode however.

wilsonp · 11-03-2010, 05:54 PM

I ran some parking lot tests in my car coasting at 15MPH down to 0 (level and up a slight hill), and the car did downshift before stopping, at a very low speed. There was no jerkiness in M or D mode going from 2 to 1.

The sport brakes are a little grabby, and I have never noticed the downshift even when barely using the brakes.

My car has 18,000 miles but I am the second owner.

Dpeters · 11-03-2010, 05:56 PM

Did you guys notice the last post on this thread was 4/15/2009 and, all of a sudden, goes to today? Kinda odd how 1 1/2 years go by and the thread continues right where it left off.

wilsonp · 11-03-2010, 05:57 PM

It is what happens when good users search before opening new topics

Jordo! · 11-03-2010, 07:47 PM

Normal. Probably either something that could be smoother in the rev matching logic or something due to the physical actuation of going from lock-up to fluid coupling from 2nd to 1st.

Sebz · 11-09-2010, 01:38 AM

I used to owe a 350z automatic with manual option, and that was the best I have owned so far. I currently own a 370z with similar transmission and I have experienced rough shifting when upshifting or downshifting. Though I don't usually shift down to 2 or 1. This is quite disappointing since I love nissan products. I believe that they should have limited their gears to 6 not 7 for automatics, but I can see why at this time they didn't - lower rpm while cruising.

bumblez · 11-09-2010, 02:36 AM

Mine does that too only in M mode. Had chance to took my car to the dealer last year, but the tech told me not to using M mode...

Now I have about 24000 miles on it but the jerk is still there but not that bad though. Maybe Im getting used to.

VCuomo · 11-09-2010, 12:25 PM

Quote:

Originally Posted by bumblez

Mine does that too only in M mode. Had chance to took my car to the dealer last year, but the tech told me not to using M mode...

Now I have about 24000 miles on it but the jerk is still there but not that bad though. Maybe Im getting used to.

The tech's "solution" was to tell you to not use manual mode?

You shoulda' told the tech to

...

Venom · 05-15-2011, 09:43 PM

Mine AT does the same thing....the downshift into lower gears isnt as smooth as id like it to be. I dont notice it at all when I put it into normal drive mode.

wstar · 05-15-2011, 10:48 PM

It only does this when you let it downshift for you, because you've gone way below useful RPMs. IMHO, either downshift earlier and stay in a useful band, or if you're coasting down to a stop gently just pop it into D or N.

PapoZalsa · 05-15-2011, 10:53 PM

Quote:

Originally Posted by Venom

Mine AT does the same thing....the downshift into lower gears isnt as smooth as id like it to be. I dont notice it at all when I put it into normal drive mode.

You know you resurrected this thread from 2009.

UNKNOWN_370 · 05-15-2011, 10:56 PM

My Z is pretty jerky in manual mode. Especially if you use the stick inste

ad of the paddles. I kinda like it. It reminds me of the way the old 280z manuals used to feel like. Everytime I take off hard I think of that scene in cheech and chong up in smoke, when he meets chong for the first time. Lol. He's flippin gears and his car is jerkin while shifting. Its fun.
On another note. When I'm light on the peddle, there's barely any jerkiness if not any.

jr92 · 05-16-2011, 09:53 AM

mine is more jerky in auto than with the paddles. It like my Z doesnt know the right gear to be in sometimes, keeps changing its mind at times

11-03-2010, 05:54 PM	#34 (permalink)
wilsonp A True Z Fanatic Join Date: Jul 2010 Location: Virginia Posts: 1,134 Drives: 2009 Touring Sp Nav Rep Power: 17	I ran some parking lot tests in my car coasting at 15MPH down to 0 (level and up a slight hill), and the car did downshift before stopping, at a very low speed. There was no jerkiness in M or D mode going from 2 to 1. The sport brakes are a little grabby, and I have never noticed the downshift even when barely using the brakes. My car has 18,000 miles but I am the second owner. __________________ 2014 Cayman S PDK Sport Chrono White/Black Was 2009 370Z Touring Sport+Nav 7AT Metallic Black/Persimmon Was 1991 NSX Auto Black/Black

11-03-2010, 05:57 PM	#36 (permalink)
wilsonp A True Z Fanatic Join Date: Jul 2010 Location: Virginia Posts: 1,134 Drives: 2009 Touring Sp Nav Rep Power: 17	It is what happens when good users search before opening new topics __________________ 2014 Cayman S PDK Sport Chrono White/Black Was 2009 370Z Touring Sport+Nav 7AT Metallic Black/Persimmon Was 1991 NSX Auto Black/Black

11-03-2010, 07:47 PM	#37 (permalink)
Jordo! A True Z Fanatic Join Date: May 2010 Location: nirvana Posts: 6,394 Drives: 2023 NATM Rep Power: 418	Normal. Probably either something that could be smoother in the rev matching logic or something due to the physical actuation of going from lock-up to fluid coupling from 2nd to 1st. __________________ Enjoy it. Destroy it.

11-09-2010, 01:38 AM	#38 (permalink)
Sebz Base Member Join Date: Oct 2010 Location: Houston Posts: 2 Drives: 370z Rep Power: 15	Don't really like this transmission... I used to owe a 350z automatic with manual option, and that was the best I have owned so far. I currently own a 370z with similar transmission and I have experienced rough shifting when upshifting or downshifting. Though I don't usually shift down to 2 or 1. This is quite disappointing since I love nissan products. I believe that they should have limited their gears to 6 not 7 for automatics, but I can see why at this time they didn't - lower rpm while cruising.

05-15-2011, 10:48 PM	#42 (permalink)
wstar A True Z Fanatic Join Date: Mar 2009 Location: Houston, TX Posts: 4,024 Drives: too slow Rep Power: 3594	It only does this when you let it downshift for you, because you've gone way below useful RPMs. IMHO, either downshift earlier and stay in a useful band, or if you're coasting down to a stop gently just pop it into D or N. __________________ 7AT Track Car! Journal thread / Car setup details

11-03-2010, 02:12 PM	#31 (permalink)
ninous26 Base Member Join Date: Sep 2009 Location: Phoenix AZ Posts: 112 Drives: 03 G35 black 5AT Rep Power: 16	This is normal. The tranny in my AT G does this and its annoying.. I have confirmed this with other people in the G world.. You should see what happens when you're rolling around 5 mph in 2nd then tap it into first lol. When I do that some electronic module thing starts going off and makes a "t-rrrrr" zipping sound for a split second then there is a plusing sound.. This all happens very quick but all normal. Edit: Just to be clear. Yes my car has a violent jerky shaky down shift in "D" coming from 2-1 when going slow.. The triptronic thing is just as bad. Normal.

11-03-2010, 04:02 PM	#32 (permalink)
c41006 A True Z Fanatic Join Date: Oct 2010 Location: Atlanta Posts: 9,034 Drives: '10 G37 Coupe BO 7AT Rep Power: 114	Mine does this sometimes in D

11-03-2010, 04:35 PM	#33 (permalink)
JACKPAC Track Member Join Date: Sep 2009 Location: Kentucky Posts: 516 Drives: MB 370z Rep Power: 17	It's normal for some jerkiness while in M mode. The "auto" downshift in M is at a low RPM as others have mentioned. It's not normal to jerk in pure D mode however.

11-03-2010, 05:56 PM	#35 (permalink)
Dpeters Base Member Join Date: Nov 2009 Location: Atlanta Posts: 88 Drives: 2009 Nismo PG 370Z Rep Power: 15	Did you guys notice the last post on this thread was 4/15/2009 and, all of a sudden, goes to today? Kinda odd how 1 1/2 years go by and the thread continues right where it left off.

11-09-2010, 02:36 AM	#39 (permalink)
bumblez Enthusiast Member Join Date: Sep 2009 Location: VA Posts: 326 Drives: Amuse 370z Rep Power: 16	Mine does that too only in M mode. Had chance to took my car to the dealer last year, but the tech told me not to using M mode... Now I have about 24000 miles on it but the jerk is still there but not that bad though. Maybe Im getting used to.

05-15-2011, 09:43 PM	#41 (permalink)
Venom Base Member Join Date: Apr 2011 Location: Wilmington Posts: 3 Drives: Black 370Z Touring Rep Power: 14	Mine AT does the same thing....the downshift into lower gears isnt as smooth as id like it to be. I dont notice it at all when I put it into normal drive mode.

05-15-2011, 10:56 PM	#44 (permalink)
UNKNOWN_370 A True Z Fanatic Join Date: Jul 2009 Location: ny'r livn in tx Posts: 8,687 Drives: well over 130m.p.h. Rep Power: 14858	My Z is pretty jerky in manual mode. Especially if you use the stick instead of the paddles. I kinda like it. It reminds me of the way the old 280z manuals used to feel like. Everytime I take off hard I think of that scene in cheech and chong up in smoke, when he meets chong for the first time. Lol. He's flippin gears and his car is jerkin while shifting. Its fun. On another note. When I'm light on the peddle, there's barely any jerkiness if not any.

05-16-2011, 09:53 AM	#45 (permalink)
jr92 Base Member Join Date: Feb 2011 Location: maryland Posts: 41 Drives: 2009 370z touring Rep Power: 14	mine is more jerky in auto than with the paddles. It like my Z doesnt know the right gear to be in sometimes, keeps changing its mind at times

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