Whining noise at 3K - 4K RPM during shifts

[Jacko3]

On Saturday, i noticed this whining noise when i shift between 3K - 4K in first to third gears. Below this range and above it, there is no whine or sound. The shifting is smooth and great. It is just the underground whine noise that seems to have occured all of a sudden. I also changed my transmission fluids last week Wednesday, and I doubt it has anything to do with this new occurence. Anyone know why transmission whines might be heard or occur, in a 2007 G-35 Coupe 6MT? I am scheduled to take the car in on Wednesday to get it checked out. I might ask them to chage the transmission fluid again to whatever they use at the dealership.

[Eikon]

How many miles do you have on the car?

Can't be many since it's an '07. But I'm just curious...

Sometimes the internals of a transmission can pick up sediment and sludge that tends to deposit in certain places on the gears and splines and other internal bits. Those sediments normally deposit in places that are not harmful since any contact with other parts of the transmission would immediately dislodge them. Sometimes a fluid change of the transmission can displace and stir up these sediments and lead them to deposit in new places that are not so good. It can take some time for these sediments to redistribute to less harmful places as they get used to the new fluid environment.

This is usually an issue with high miles cars... and most likely not with your nice new '07. But this could have a small impact on the sounds your transmission makes.

[telcoman]

On Saturday, i noticed this whining noise when i shift between 3K - 4K in first to third gears. Below this range and above it, there is no whine or sound. The shifting is smooth and great. It is just the underground whine noise that seems to have occured all of a sudden. I also changed my transmission fluids last week Wednesday, and I doubt it has anything to do with this new occurence. Anyone know why transmission whines might be heard or occur, in a 2007 G-35 Coupe 6MT? I am scheduled to take the car in on Wednesday to get it checked out. I might ask them to chage the transmission fluid again to whatever they use at the dealership.

Jacko3

It might be that its payback time from your G? Constant flogging it may have pissed off your G and its now getting back at you?

You don't mention how many miles are on your G but I have over 51k on mine and have no intention of changing MT fluid. If its not broke, don't try to fix it. Despite what the owners manual says, I believe the time to change the MT transmission fluid is at the first clutch replacement?

Telcoman

[G_whizz]

Thaks Eikon and Telco!

[Jacko3]

Eikon and Telcoman:

Thanks for the advise! You know I actually began to think it was payback time, on Saturday . Yes, i should have left my old oil in it. But, i was worried that floging it routinely would require constant change in fluids.

My car is an 07 6MT with 20K miles.

Eikon:

I seem to agree with you. I actually came to the same conclusion. I feel if I drive it for another 6,000 miles or more, the new oil will thicken and redeposit stuff elsewhere, and thus, keep the transmission quiet, over time(just a wild guess). The whining isn't that bad or loud. My Stillen exhaust sound muffles the whining sound on the outside. But, being particular about maintenance, I can hear it between 3K - 4K shifting in 1, 2, 3 gears. Maybe I should have left the transmission fluid alone, since the mechanic that replaced it said it was still clean. I think next time, all that I will do will be the differential oil. I am taking the car in on Wednesday to see what they think about the noise. Maybe, they might have to change the transmission oil again--I don't know! The replacement oil used was a BG synthetic gear oil.

[C-Kwik]

Double check what kind of fluid was used. You should be using a GL-4 fluid. If your mechanic put in a GL-5 fluid, it could be eating away at your syncros and bearing depending on what they are made from.

[Jacko3]

C-Kwik:

Thanks!

[ArizonaG35]

I get a whining noise in my car at about 4krmp-6krpm but it only happens when my wife is in the car! I sounds something like... "Why do you have to waste gas?!" Then other times it changes its pitch and sounds like "Are you trying to impress someone?" Then other times is sounds like "Quit driving like a jackass!"

I've found that if I just keep her out of the car, then the problem goes away... maybe you should try that...

[Omegamerc]

Secret built in turbo!?

GL w/your prob.

[C-Kwik]

There's an easy DIY solution for that:

[Jacko3]

I am also wondering if enough fluid was even put into the car to begin with?

[ArizonaG35]

[joe603]

I get a whining noise in my car at about 4krmp-6krpm but it only happens when my wife is in the car! I sounds something like... "Why do you have to waste gas?!" Then other times it changes its pitch and sounds like "Are you trying to impress someone?" Then other times is sounds like "Quit driving like a jackass!"

I've found that if I just keep her out of the car, then the problem goes away... maybe you should try that...

....hey wait a min, that sounds EXACTLY like something my wife would say!

[telcoman]

....hey wait a min, that sounds EXACTLY like something my wife would say!

The longer you are married the more they all sound the same

[Beezer]

Ha. I always get "its not a race you know" or "we don't have to be the first people there."

[nsrZ32]

Definitely check the type of fluid and the quantity of fluid in the car.

We had a 350Z come into the dealership like 3 months ago that had the wrong fluid used and it was making a noise similar to what you describe. Once with drained it and put in the correct fluid the noise disappeared instantly.

[Sentientbydesign]

nsrZ32,

I want your car!!!

[nsrZ32]

nsrZ32,

I want your car!!!

Haha nice.

If you're ever in Cleveland hit me up and I'll take you for a ride in it

[zozoka1212]

I don't know. I guess I am lucky. Whenever I rev up and go My wife like man I love this car.

My wife drives fast too.

So guess what I do every time wrooom wrooom.

hehehehe

zozo

[Jacko3]

Got the car checked out by my mechanic. He drove it and tested it, and confirmed that the fluid level and quality was okay. The gears actually shift better after I had cojmpleted the oil change. The whining/whistling noise, he said, was probably a function of looser gears moving more freely than when i first bought the car, and which he said was expected since I drive ina spirited manner. He also said that the oil that was put in the car was a better quality oil than what they currently use because it comes with an even better additive. The car shifts great.

I guess i will have to live with the whistling/whinning noise for now--doesn't bother me much, except for the fact that i am conscious of it now. Anyway, my warranty is 70,000 miles on transmission. So, if it quits, Infiniti will replace it. BTW, that same noise was evident in the car, only in the first gear at 1K - 2K RPM, when I first bought the car. My mechanic said, so long as the shifting is crisp and great, and that i don't experience any grinding noise, then I am fine, since he is aware of the other manufacturers superb synthetic product. Different manufacturer products of equally high quality will sometimes make your car behave differently.

I guess the G-35 creates all kinds of noise

[G_whizz]

Hmmm... I dunno Jacko... it seems a lil weird to me... are you sure??

[zozoka1212]

Sorry man but I think he BS you. I would take it to the dealer and ask. But if you happy with his answer than be it. I wouldn't be that's for sure.

zozo

[nsrZ32]

Sorry man but I think he BS you. I would take it to the dealer and ask. But if you happy with his answer than be it. I wouldn't be that's for sure.

Couldn't agree more. Definitely got hosed.

[joe603]

+1 take it to a dealer!!

[telcoman]

Couldn't agree more. Definitely got hosed.

Jacko3

From my experience the quality of workmanship in the state of Florida in almost everything is of a very poor quality. Almost every child seems to be left behind? The education system is poor. Wage rates are low and it is a right to work state. You need to be very careful when having any kind of work done. I think you need to get a second opinion from a qualifed mechanic at an Infiniti dealer and not from the person who possibly put in incorrect fluid in your transmission?. Did the mechanic get this so called better quality transmission fluid from China? If your transmission quits & incorrect fluid is in it, I would not count on a transmission replacement to be covered under warranty by Infiniti. Just my $.02

Telcoman

[joe603]

^ yes, in fact if you don't follow the owner's manual which states which fluids should be used, Infiniti can deny your warranty claim.

[Jacko3]

The mechanic I took it to, this morning, was at the infiniti dealership. If he says it is okay, and if the transmission quits---remember he drove the car, then they will put a new transmission in the car. Worse case scenario, i would ask the dealership to drain the existing oil in the transmission, and let them put in whatever it is they use on their cars. Mind you, i am talking about Infiniti and Nissan Dealerships.

[rn79870]

Jacko3

From my experience the quality of workmanship in the state of Florida in almost everything is of a very poor quality. Almost every child seems to be left behind? The education system is poor. Wage rates are low and it is a right to work state. You need to be very careful when having any kind of work done.

Telcoman

Florida has commissioned a new voting device for the 2008 elections.

[Jacko3]

Just received a second note of confidence from the Infiniti dealership that all is well with my transmission. I have no reason so far to doubt them. Afterall, I have had the whistling/whinning noise only in the fisrt gear for months, and it didn't affect nothing. I also confirmed that a GL-4 synthetic fluid was used in the transmission. Everything appears to be in order. It seems to me that once the original and first OEM parts are removed from the G-35 Coupe, other types of sounds, smells, and behavior, become the order of the day for the car, and things never seem to be the same. My car actually shifts and drives better than before the oil was changed. The only issue is the light and insignificant whistling/whinning sound that only occurs at 3K - 4K RPM during shifting in 2nd and 3rd gear, and only momentarily. Every G-35 Coupe has its unique noise, sound, and smells!

[Sentientbydesign]

Just out of curiousity, why did we all pay between 35 and 40 grand for a car that can't be driven quietly?

I don't mean intake/engine/exhaust noise, I mean transmission/clutch/differential noise.

I asked my dealership friend yesterday if it was normal for my G to sound like a truck, he said, well yeah.