i just want to remind you that spinning things whine. including tires, bearings, etc. CVT's are known for the whining.kerrton wrote:I think my whining CVT is getting worse. It used to only do it on long hot highway trips in the summer, but I took a 250 km road trip yesterday on a cooler spring day, around 10-15 degress C and it whined like crazy when the rpms were above 2500, and at below that you could hear a bit of a constant whine at highway speeds of 120kph. It's making me a little nervous, when mechanical things like pumps, generators etc. start to make a whining noise like that it usually means the bearings are shot and could seize up and fail soon. I can live with the CVT noise but not with a breakdown on the highway with my wife and two small kids.
If you have any more info on this "wrong CVT dipstick" issue and service bulletin describing it, please let me know.
i think thats apart of the training when being hired by a car dealership lol "IF ALL ELSE FAILS: ACT SURPRISED!" lolkerrton wrote:when I mentioned it to my service manager a few months ago he was totally surprised
i dont go to the dealer, or any mechanic for anything aside from tire mounting. but the dealership i bought the car from, play's dumb, tries to make an idiot out of me, and are the types to tell me that my flux capacitor needs changing.Ddflosrt wrote:If you are still having a whining sound I would def take back to the dealer. IF we see one that whines all the time there is a bearing that could be damaged and the transmission may need to be replaced. Altimas I beleive have a tsb on this. The cvt shouldnt be whining like that. I can probably find the tsb on the dipstick issue. The dealership you go to should have all that info though.
They have to wait for approval and reimbursement from Nissan, and if Nissan refuses to cover the repairs, the dealership eats the cost. While it may keep operating costs down for the dealership, it doesn't foster good customer relations.darylzero wrote:I thought dealerships wanted to do recalls and warranty work because they get paid directly from Nissan??
not all dealers wanna get in involved with certain work. if they currently dont have a really experienced tranny guy, guess what = your not getting your work done. or if they simply dont want the hassle, they will find an excuse NOT to even get involved.darylzero wrote:I thought dealerships wanted to do recalls and warranty work because they get paid directly from Nissan??
kerrton wrote:So I think you've answered or partially answered a long-debated question that we've had:
"Is the high-rpm whining noise in hot weather something to be concerned with if it doesn't go into limp mode and appears to be operating properly?".
From what you've said above, the whining is caused by the tranny fluid becoming "aerated", or I'd call that "foaming" like when you overfill a crankcase. When lubricant becomes aerated and foams, it loses its lubricating properties and you get component damage. If the concept is the same with the CVT fluid as it is with engine oil, then the whining is not a good thing, it indicates that the CVT may be under-lubricated and wearing excessively.
I've gone at least 2 summers expericencing the whining noise on warm to hot road trips, the hotter the weather the louder the whining noise. I've never worried too much about it, mainly because its such a pain to try to prove to a tech that there is an issue.
Even though I've never gone into limp mode, would you suggest that I have my Nissan Service shop look in to this and re-adjust my CVT fluid level? I wish there was a tech service bulletin to reference, that would make life a lot easier because I'm pretty sure my shop won't know about this issue, in fact I did mention it to the service manager in passing once and he said he'd never heard of any CVT with that issue.
Any ideas are appreciated, thanks again.
EDIT: I did find a new Service Bulletin, it doesn't talk about diagnosing the whining noise without fail-safe mode, so no answers there. But it does talk about fail-safe mode when hot:
Summary of NTB12057:
SERVICE INFORMATION A Continuously Variable Transmission (CVT) is designed to go into fluid temperature protection logic mode ("fail-safe mode") if the CVT fluid temperature rises above a certain threshold. When the CVT goes into fail-safe mode, engine performance is reduced. Customers may report this condition as "low power" or "reduced engine performance". While the CVT is designed to go into fail-safe mode if the fluid temperature rises above the threshold, the following conditions may causethe CVT to go into fail-safe mode prematurely during normal vehicle operation: 1. Overfilled CVT fluid level. 2. Incorrect type of transmission fluid - Use Genuine Nissan NS-2 CVT fluid. 3. Incorrect coolant/water mix. See this bulletin (startingon page 2) for more detail on each of the above conditions.
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Many Thanks !!!!kerrton wrote:You need to have a paid subscription to download the bulletin, your dealer would be the source for these. You can look up the short synopsis of the TSB's and recalls at:
nissan-techinfo.com.
When you go to your dealer, just reference the above document number "NTB12057", they can bring that document up in full detail for review.
Hmm, I just had mine in for an oil change/tire rotation with just over 21k miles. They hit me up for an alignment but said nothing about the brake fluid.Ddflosrt wrote:At the dealership I work at the intervals for CVT fluid change is every 30,000 miles. We do a drain and fill only. We usually use 5 quarts of fluid. Keeps the cost down for the customer. If the fluid hasn't been done in 90K or so we usually suggest a flush at that time. We get these intervals out of the Nissan maintenance manual. Also Nissan changed there brake fluid flushes to every 15k lol. Damn Nissan.
Appreciate the inside perspective of this thread. I am probably going to change the CVT myself. It seems that many CVT owners are reluctant to do that due to the threat of a cancelled warranty. It is my understanding that the law is that it must be proved that your actions caused the failure, have these steps been taken in your experience or are people being too cautious? I would only be using Nissan fluid. It seems that going the DIY route would still be over $100. Just called a dealer and their price is $170. Looks like they put all their markup in the fluid rather than their labor. That dealer also doing the 30k interval citing our heat as the reason.Ddflosrt wrote:At the dealership I work at the intervals for cvt fluid change is every 30,000 miles. We do a drain and fill only. We usually use 5 quarts of fluid. Keeps the cost down for the customer. If the fluid hasnt been done in 90K or so we usually suggest a flush at that time. We get these intervals out of the nissan maintenance manual. Also Nissan changed there brake fluid flushes to every 15k lol. Damn Nissan.
since everyone brakes differently, everyone's pads & fluids age differently.Rogue One wrote:They hit me up for an alignment but said nothing about the brake fluid.
How about a how-to for bleeding your brakes?ImStricken wrote:since everyone brakes differently, everyone's pads & fluids age differently.Rogue One wrote:They hit me up for an alignment but said nothing about the brake fluid.
take a look at your fluid reservoir. what color is the fluid? Brake fluid starts off nearly clear with a light yellowish tint. As it is used the fluid will darken and become dark brown in appearance. generally once a year, to once every two years is fine to change that fluid.
good versus bad (i have seen plenty that turned passed the syrup brown, and into coffee black. dont let it get to that)