370z Auto question
 

I have been told many things bout the transmission fluid from its maintenance free and you have to change it at 30k. Okay last time i went to the dealer around 33k i ask them would i be needing new trans fuild and i was told no that it is maintenance free. Now im at 43k do i need a trans flush or what so confused lol

It's pretty much a sealed unit. Check the manual. They don't call for it to be changed until much later than 43k.

Change it at 100k. Until then. Don't worry

:iagree:

That's werid because the dealer that checked my oil said I should've changed it at 30k. Are they just trying to make money or is that true . Anyone change there's at 30k

Go to the dealership for clarification and they will let you know when the intervals are. I have never heard of a maintenance free transmission. Something sounds funny about that.

OIL? Or transmission fluid?

If they checked your transmission fluid, they are lying. Kill them. Call corporate



I changed mine at 34k... Because my motor was dropped... Twice... And my radiator was changed to a CSF... Lol
Not a one damn change in feel btw. Exactly the same

Almost every new auto is "sealed" and branded as "maintenance free." It means 100k+ service intervals

*shouldvr changed the trans fuild as well*

Nope. Read the manual. It gives you the intervals for fluid changes. The dealer was trying to screw you.

Should I go about changing the trans fluid that doesn't bother me I'll pay 200$ any day to make sure everything is right. I know that every 100k you change trans fuild on any car. But why am I bring told to at 30k don't get it

Assh%*l€! They gotta try make money some how right lol

Stop worrying about the transmission fluid. It's fine for another 50k miles.

okiee dokiee thought to just make sure.

Actually it's a little more complicated than that. Nissans lifetime (or at least, ~100K) change interval is really only applicable if you drive the car like a grandma and never heat up the fluid much (which might be true of most 7AT's ever sold, so their recommendation does make sense on average).

If you drive the car hard at all, even on the street, you should at least swap the fluid every 20-30K miles or so. Mine was pretty nasty and burnt looking after 20k of mostly-street miles with only a few track weekends. Basically the hotter you get the fluid, the more often it needs changing. Unfortunately we don't get a fluid temp gauge with this car (much less one that tracks peaks, which is what really matters), so unless you install an aftermarket one, you're gonna have to guess, or drain a tiny bit of the fluid and check it's quality (is it really dark? does it smell burnt? does it feel like the same viscosity in your finger as new fluid?). Running a trans fluid cooler can extend the life of it too.

Or you can just do every 20-30K miles for harder street driving and figure you're probably in the ballpark. It's not like the cost of a trans fluid swap on that long of an interval adds much $/mile in the end.

There's a chart of peak temp vs recommended change interval at the end of this PDF (from GTM's instructions for their 7AT upgrades): http://www.gtmotorsports.com/Manuals..._Procedure.pdf If you do have a temp gauge installed or can estimate your peaks based on IR thermo to the trans pan straight after a hard session, you could roughly go by that.

If you decide to have a dealership swap the fluid for you, be sure to read up on the procedure in the Service Manual (available in the appropriate subform here) yourself, and talk to the service guy at the dealership and make sure that he knows how to do it and that you know how it should be done. Don't let them wing it and hook up some "trans flush" machine like a crappy oil change place does for some random soccer mom SUV. They need to manually drain and fill a portion of the fluid in multiple stages and use Consult-III to monitor fluid temp for proper level setting at the end.

just because it is burnt looking does not mean it's bad. i remember reading a blackstone report on a ATF sample from our cars and they said there was nothing wrong with it. Nissan even issued this:

http://www.the370z.com/attachment.ph...1&d=1382811569

Thanks for all that information, the reason why I'm asking is because in sports mode when the 7AT comes to a stop it isn't as smooth as it use to be and the hotter the car the more rough it downshifts by itself. Makes since because I do drive the car hard and get on it a few times a day.

That's mainly a function of line pressure -- the up and down shifts can at times be a tad rough (especially down from 2 to 1, which involves getting out of lock-up and switching to fluid coupling only).

Wstar's point is well taken -- a few track days can SERIOUSLY wear down tires, brakes, and greatly heat up fluids -- but even spirited daily driving shouldn't get you anywhere near the kinds of stress you put on the car on a closed track (unless you are fleeing the police or something now and then :p ).

That's not to say an early change would hurt, but its improbable that its needed unless you track your car, and if you do that, a beefier ATF cooler wouldn't be a bad idea.

Where would I be able to find a good deal on that cooler. Any install tips is it as easy as a oil cooler . And would it benifit a stock Z

What do you mean line pressure , what does have to do with the hard low end gears

GTM Motorsports*::*AUTOMATIC TRANSMISSION*::*GTM HD TRANSMISSION COOLER FOR VQ

you'll need to take it to a dealer after the install to check your fluid level but you can DIY.

looks like they also have this kit now too

GTM Motorsports*::*AUTOMATIC TRANSMISSION*::*GTM 25 ROW COMPETITION TRANS COOLER FOR VQ

I've notice when your being rough and driving like a jacka. The car gets really hot and sometimes seems likes it's guessing gears, especially when it auto down shifts from 3-1 it's really roughy and sounds werid. Could this problem cause any long term affects on the trans because my power train warranty is about gone this upcoming year. Forsure looking I to an exanded one.

I'm not looking to do any big upgrades to my car but I will be getting a CBE and cold air intakes. I've also been Instrested in the oil and trans cooler would it be doing me much for consist daily street driving. Or would it just be a waste since it won't be on a track

I know it says "maintenance free" and the transmission has no drain plug, but I requested the dealer change my fluid at 40k. There was a significant difference in smoothness and transmission shifting speed afterwards.

I never buy into that lifetime fluid stuff. That is a concept to try and sell cars. The fluid does get worn and changing it more often won't hurt.

I bet , give me every more reason to do so. Sometimes I wish I was just dealing with a manual because if something goes wrong at least it'll be as easy/cheaper getting a clutch then going threw an auto trans. But I still love my 7AT Z

Just want to do that a trans cooler with extand/better the life of the tranny then that add on messing it up in the long run somehow

Yeah if you're not driving too hard who knows, but again it's not that expensive to swap it ever X0,000 miles (20, 30, 40? whatever, just not 100). By the way, the trans *does* have drain and fill plugs (both on the bottom of the pan itself, the fill plug has a tube sticking up from it on the inside to set the level), and it is possible to do DIY fluid swaps on this car (I've done it), but it takes a little guesswork with an IR thermometer to set the level at the correct temp, and you have to put together some custom tubing for the fill port.

I would attempt to do it myself but for $200 I'd rather not go threw the trouble and let the dealer do it. But what worries me is them doing a good job on setting the right level and what not. I don't want my car to be a test dummy to a new guy you know. But there's nothing I can do but cross my fingers lol

Then you don't need the oil cooler unless you see your oil temps spiking to 240+ (which is unlikely, but may happen since we don't know your driving habits), and you don't need a tranny cooler. And you don't need to change the tranny fluid right now.

Basically, leave your car alone and drive/enjoy it! :D

I just changed my oil..damm it it 'slips' more than before change..& worse the agent claimed it is normal..mileage just 22,000km...

probably shouldn't have changed it...

Agreed.

Changing the fluid properly can only make things better. If something got worse, blame the person who did it, and make them fix it :P It's not that hard, but as noted earlier there is a very specific procedure for this car that involves special tools, and a lazy dealership who thinks it's just another trans flush on a stupid minivan will do it wrong.

30k is for the manual transmission 370z

autos dont need to be serviced until 100k

Dealership was trying to get me on that one as well. I will probably do it at 60k.