Who's 7AT is "kicky"

[ddvette9]

Anyone who splits 50/50 between manual mode and regular drive notice a kicky/ jumpy computer controlled regular drive in between shifts. It is like the Computer cant make up its mind. I think there may be a post on this but not sure. I guess it is just the effect of constantly confusing the computer with the multitude of driving patterns, but good god as my car climbs in miles (now 33k) regular drive is jumpy and sputtery as all hell sometimes, the computer needs to sharpen up its shifts

[ImportConvert]

What mods do you have?

[NickTurnon]

Im in the same boat. When i first drove the car, I test drove it only in auto. I didnt even really use the paddles or manual shifting. Then after my exhaust went on, i will be driving at 20 MPH and the exhaust will rev high for no reason.

SOLUTION= TUNE. I am going to get intake & get my car tuned. It should give it much more power and should smooth things out a bit. Im at 36k

[b1adesofcha0s]

The ECU does adjust shifting in regular D mode depending on how you're driving. I think it also depends on how much you press the throttle. If you're driving with the throttle at like 25%, it's going to be more relaxed and shift at lower rpms. If you hit WOT it's going to be more aggressive and the revs will go up towards red line before it shifts

[Jordo!]

2-1 downshifts can be rough, probably because you're going from lock up to fluid coupling.

3-4 upshifts are occasionally a little extra firm -- must be just due to how the planetary gears are set up.

Sounds normal, but check underneath to make sure you aren't leaking fluid from the trans housing, and therefore possibly running low on fluid.

Originally Posted by b1adesofcha0s

The ECU does adjust shifting in regular D mode depending on how you're driving. I think it also depends on how much you press the throttle. If you're driving with the throttle at like 25%, it's going to be more relaxed and shift at lower rpms. If you hit WOT it's going to be more aggressive and the revs will go up towards red line before it shifts

Yep -- ECU seems to learn from M mode.

Yep again, line pressure and shift firmness are dictated by throttle position. Can also be tuned with Osirus to be faster and firmer even at low load.

[UNKNOWN_370]

My Z is an auto... I know what you're saying. you will feel the sensation when you transition from normal to aggressive driving.. once you have established to the car your style is aggressive or calm. It will completely adjust within the minute. Its just a hiccup of the ECU relearning your expectations from the car.

[b1adesofcha0s]

Originally Posted by Jordo!

2-1 downshifts can be rough, probably because you're going from lock up to fluid coupling.

3-4 upshifts are occasionally a little extra firm -- must be just due to how the planetary gears are set up.

Sounds normal, but check underneath to make sure you aren't leaking fluid from the trans housing, and therefore possibly running low on fluid.


Yep -- ECU seems to learn from M mode.

Yep again, line pressure and shift firmness are dictated by throttle position. Can also be tuned with Osirus to be faster and firmer even at low load.

Nice, even more reason for me to get my Z UpRev tuned.

[ddvette9]

yea. after beating up the tranny for a few days in manual mode, when i get tired by the end of the week and drive around in regular drive like a grandma the gears are jumpy and not fluid. The ECU is obv adapting and still trying to shift from the previous day's manual shift points. Its all ECU. Coupled with my exhaust, y pipe and drop ins without a tune and my constant change from redlining in manual to driving like my mom in overdrive lol

[Mecinoid]

Originally Posted by UNKNOWN_370

My Z is an auto... I know what you're saying. you will feel the sensation when you transition from normal to aggressive driving.. once you have established to the car your style is aggressive or calm. It will completely adjust within the minute. Its just a hiccup of the ECU relearning your expectations from the car.

I buy this... that is about how I see it happening.. a single hiccup and then you over it. But the map takes time to populate the new data so that could take a few minutes. I know that in 10 minutes time my shift points have completely reset to my driving style if I stay in that style. You do bursting and it tends to confuse the mapping a bit and give you weird outcomes to the shifting map. Only my opinion... However, that how it seems to work for me.

Try to stay in one driving style or the other for more than 10 minutes and it will be more apparent to you I think.

This is why at the track you want to take some practice laps.... to get to all set in.

[UNKNOWN_370]

Originally Posted by Mecinoid

I buy this... that is about how I see it happening.. a single hiccup and then you over it. But the map takes time to populate the new data so that could take a few minutes. I know that in 10 minutes time my shift points have completely reset to my driving style if I stay in that style. You do bursting and it tends to confuse the mapping a bit and give you weird outcomes to the shifting map. Only my opinion... However, that how it seems to work for me.

Try to stay in one driving style or the other for more than 10 minutes and it will be more apparent to you I think.

This is why at the track you want to take some practice laps.... to get to all set in.

Your analysis is spot on. On the track though. The weird thing about the Z is this. If you drive hyper-aggressive, like on a track. The Z will read you in seconds over minutes. There something about street driving that changes the Z from reading you quickly. Its like that tranny wwas designed to work on the track. Give it a whirl and let me know.

[Mecinoid]

Originally Posted by UNKNOWN_370

Your analysis is spot on. On the track though. The weird thing about the Z is this. If you drive hyper-aggressive, like on a track. The Z will read you in seconds over minutes. There something about street driving that changes the Z from reading you quickly. Its like that tranny wwas designed to work on the track. Give it a whirl and let me know.

Yeah, I noticed that again tonight when I was putting around with the wife. I then tried to show here the difference between auto and sport mode. After the putting around we were doing (looking at xmas lights) it took like a second to shift after tapping the shifter. After I left her at home and ran some twisties for about 5-10 mins it was back to shifting about as fast as I could hit the stick. Much faster than if I had a manual in there.
BTW- I speed shift my Firebird with SC at the track. Most people think that is without clutch and slamming gears. In reality you drive with the gas on the floor hit the clutch and as it hits the bottom your pulling/pushing into the next gear. Here's the part most people miss: Then you side step the clutch letting the pressure pop the clutch pedal back to it's natural state much faster than you can lift your leg .... repeat

Just make sure to inspect your rubber clutch pedal bumper every once and a while or, you'll start hearing some nasty banging.

Warning this will prematurely wear out your clutch and there is grave danger of twisting/snapping input shafts on your tranny if you don't get it just right.

Hence this is why I'm liking the S7 tranny so much! It protects the tranny with fast progressive engagements and then it locks up. Nice .....

Enjoy the ride.
aka Z Driver @ 350Z.com