*** UPDATE***7AT question/possible issue help
 

Recently on some spirited runs Ive noticed my cars transmission doing something odd. Basically just crusing going about 65-70, go WOT,usually the car just drops gear and takes off. But this time it seemed to almost double rev(?) while it hit 3rd and took off. Like you would hear/see the engine and revs shoot up and then grab the gear and go. I hope that makes sense...but you can hear the engine go "ruumm' *once...then "ruumm" twice and on the second rev is when it took off... anyone heard of this before? has happened a few times already thanks

Sounds like low fluid level to me. Possibly a weak pump. Edit: That's going by my experience with much older auto trannys. Could be a lot of other things with a TCM-controlled transmission.

With the proper OBD/CAN software, you can monitor/log transmission parameters to get a better idea of what's going on.

please elaborate more on the "ruumm" sound.

most likely downshifted twice to a lower gear (ie downshift once to a lower gear (first rumm), and then downshifted once again to another lower gear (second rumm). its possible depending on the speed/gear your car was in at time of WOT.

was this in manual or auto mode?

if you downshift at the moment the tranny is auto downshifting you'll get a double downshift.

It was in normal D, just floor it and it does one rev to match rev then it kinda revs again and this catches gear and takes off

From 60 mph it can only drop to 3rd gear though is what worries me

It was ruuuummmm!! Then RUUUUUUUUUUUMMMM! Lol

what do you mean it can only drop to 3rd at 60mph and that worries you?

sounds about where you'd want to be for a drop the WOT run at those speeds even 4th as well.

how do you know what gear you're in? you're in D.

it's probably just downshifting, then realizing it needs to go to a lower gear. doesn't really sound like a problem

thats vtec yo!

please post audio of you doing this :tup:

Thats what i mean, between 60mph and about 75mph the transmission shouldnt be shuffling around for gears. 3rd is the only option at WOT. It feels like the car blips the throttle then grabs gear and goes... Instead of dropping gears and going all at once like normal. Im gonna do the fluid flush here ina few mins

If you ever want to know what gear your car puts you i. At wot whild in D, just tap it over to manual mode and youll see it in the tach

Vtec??!!! Lmao... I want my VVEL back hahah

Some one say rum?

http://img2.wikia.nocookie.net/__cb2...micCon_Rum.PNG

how many miles are on the car?

how often do you drive in manual mode?

wat is your address?

wat is your social security number?

whats your favorite flavor lube?

30k. Damn its hot out here

do you drive it mostly in auto or in manual?

when you drive a lot in manual mode the ECU/TCM will learn your driving style and inputs then adapt for when its in auto mode to mimic how you drive in manual.

:rofl2: wtf..

he was talkin fluid change. I said brand of lube didn't I?

:wtf2:

we all knowz wat u REALLY meant..!

:yum:

Transmission fluid done, oil change done... And this thread just got a....:wtf2:....:roflpuke2:

I agree
 

Some of these guys really go silly. I have often noticed, at this time of day, work day, a lot of guys (bored?) are on site. .???

auto tranny fluid flush at 30k? too early no? i was under the impression auto tranny fluid good for a while....

He got talked into it by the stealership

I did it at home

:icon18::icon18::icon18::icon18::icon18::icon18:

if you're cruising in D at 60-70mph...your torque converter is in lock-up mode,,,stomp the gas & it takes a split second to downshift to 3rd & then upshifts to 4th about 85 & upshifts to 5th at 125 then hits the speedlimiter(if not removed) about 156mph@7k.
i've done it too many times....yes flush and fill tranny/got to repeat steps 3/4 times to clean it out.

Supposed to be good for a while, but ive been reading allot of guys having less than the recommneded amount from the factory and having issues. I was gonna go with motul ATF... Nothing special about s matic fluid, its castrol made as thry provide for nissan. But i got the s matic really cheap so why not for now... Its dat VVEL doeee! Haha

I flushed mine at 50k with Valvoline Maxlife Dex/Merc ATF... Nissan matic d&j approved from walmart.used 3 gallons-about 45$


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https://vimeo.com/131051542 short burst, about a quarter mile run or just under.


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Good video man! Its shifting very well, does it throw you in the next gearbor is it seemless accelaration? What is your rev light set at btw

I think it's set at 7800, doesn't rev that high- but flashes about 500 rpm before shift.. And yes it's quick: definitely can hi 12's in qtr... Just haven't been back to track

my 09 doesn't have the shift light :(

but I've hit 12's in mine in the 1/4 :tiphat:

I have an 09 as well, and what?? we don't have shift lights?? i've never noticed bc i've actually never "tried" my car.

seems like nissan went a few steps backwards with the 09 Z vs the 350Z. my 07 Z had the shift light for sure, along with the very useful rear windshield wiper, truck hatch release button on key fob, a functional rear quarter panel window, and my personal favorite, the digital speedo.

the 370 is miles beyond and better than the 350. rear windshield doesn't need a wiper nor does it need a shift light lol I think the 350 is a step below the 370 in every way.

I think the shift light was added to the auto in 2012? but the manual had it from the start I think?

you're right, the 370Z doesn't need a rear wiper nor a shift light. heck, i bought the touring/sports package/navi model and it doesn't need leather seats, navi system. but it's just nice to have lol and adds a nice touch to it.

i thought the rear wiper on the 350Z was very useful, as it rains alot during the summer in florida.

i just wish that nissan carried over certain features of the 350Z to the 370Z.

honestly anymore I think we get more rain in PA than florida and I have never really ever felt the need for a rear wiper even in the worst downpours.

the leather seats in the touring model are great. I wouldn't have a Z without those or the new nismo seats. previous nismo seats and base are garbage.