CVT noise ??

Probably bad tires

 

It’s your tires not having enough Pressure in them so they need to be replace by your Local dealership

 

you're actually not supposed to change the oil. while it's a good idea, these tranny's are prettyrugged, and we see few failures.
how many miles on the tires?

bad cv joint?

 

wheel hub is what I would say, maybe you didn't torque the cv joint nut like you were supposed to, (been there done that, oops!) If you swapped out hubs with cheap stuff they are bad already. If you bought quality, did the job right, noise was there before you did the hubs and after you did the hubs, then I would say cvt shaft. Its not your tranny and its not your fluid. Retorque your spindle nuts cause its free and easy.

 

Its spinning, but is affected by steering. That makes it an axle hub or a cv joint because the cv shaft has a spring on it and locks in the tranny So it wont go in and out of the tranny. Because I am often interrupted during projects I have dropped the ball on two cv jobs. Both were resolved by hitting the spindle nut with a impact wrench. One just made a noise the other messed with the brake pad bracket and made a metal on metal sound when turning left. If its not tight the whole strut will move on you. The cvt joints go in and out too, and spin. So it could be one of the bearings inside the boots. You saying you replaced both shafts and still have the same issue?

 

Have you checked the rear wheel bearings?

 

As you can see, a variety of PriusChatters who cannot hear your car will give you a variety of ideas.

There is a gizmo called a ChassisEar that will let you closely monitor the sounds while driving from several places in the car at once. Something like that might be a part of the plan for reducing the number of competing ideas.

 

BrotherPriusMN, did you ever resolve your issue? I am experiencing same thing as you. Sound coming from front at 55/60 and really accentuated at 75+. Sound seems louder in front left area. Have changed front wheel bearings, fairly new tires, wheel alignment. No clicking sounds from CV axles. At 246k miles now. Changed CVT fluid about 30k miles ago. Can’t seem to figure out problem.


iPhone ?

 

What did you find? I've got a whining sound that ramps up on acceleration coming from the driver side front. I'm not convinced it's the CVT transmission. I put new tires on the car about 4000 miles ago and they've not been rotate. The driver side front wheel bearing was replaced about 15,000 miles ago. The car has 97000 miles. A local repair shop wants me to rebuild the CVT transmission and I just don't want to fork over $4,200 for this repair if its not needed.

 

What brand of wheel bearing? Why didn't they do both bearings?
Does change with different speeds? Or when turning left or right?
Depening on who/where you have the tired installed, rotation is 5000 or 7500 miles.
Doesn't hurt to do them early. If the noise changes, then you know it could be the tires.

Doubtful it's the transmission needs rebuilding. And doubtful THEY know how to do it.

 

Thanks for your reply!

they didn't do both because the right one didn't need it.
I get the car back this afternoon and will drive it at highway speeds to see what's up with the noise. I've just gotten it smogged again here in California after the auxiliary battery died and the electronics had to reset so it could pass smog. I don't drive much and I continually kill batteries here. I recall the noise occurs in a straight line, but I'll test and report back to you.

I bought General Tires from Walmart and they installed and balanced at 93,600 miles.

The left front wheel bearing was a local dealer who is Goodyear authorized and that was about 82,000 miles. Didn't do the right because it wasn't needed. The right bearing was done at about 93,000 miles. I'm at about 97000 miles now. I'll check the tire pressure when I get home too. I usually keep on top of that as well.

The repair shop is an ASCA shop and works on a lot of hybrid vehicles as well. Something just doesn't sit right with me. Hard to believe its the CVT. I called the local Toyota dealer on this and they too are just mum. Don't want to say much about a CVT going bad at 97K.

 

WELL, LOOK WHAT I FOUND?

CVT TRANSMISSIONS, WHINE, AND IT'S PERFECTLY NORMAL.

Best to get a transmission fluid change.....

Is it normal for a CVT transmission to whine? – Car Care Portal.

I'll get it back to Walmart for the free lifetime tire rotation, it's time.

 

That link is about CVTs that work in a whole different way than how the Prius CVT works. (It's kind of like an article written by somebody who has only ever seen one kind of, I don't know, printer, and writes "this is how your printer works", as if there's only one kind.)

No belts here, no pulleys, no cones. Just some solid gears in constant mesh and a couple electric motors.

 

You didn't mention you already had the right/front bearing replaced....
That's why it's "best" to replace both at the same time. They usually wear out at the same time,
or close too it.
You could get a solar trickle charger for the battery so it keep it charged when you aren't driving it.
Unless you park in a garage, then you can get a bettery tender...

You've driven the car 97,000 and never noticed the whine noise?
To properly adjust the tire pressures the tires need to be cold.
So let it sit for a few hours after driving, or check them first thing in the morning.

Make sure you have them use the TOYOTA WS transmission fluid.
The cost is the same as a copy, and designed for the transmission.

 

Hey guys, The whining just started this week so I got right on it. It’s all new to me.
The Toyota maintenance guide says to change transmission fluid at about 120,000 miles or 96 months so here I am at 97,000 miles about 20 years later.

I do have a tender but it’s got to be hooked up to the battery in the back and that’s a bit of a pain in the rear. It won’t charge off the cigarette lighter. I’ve since started driving it a bit more on short hops to avoid killing the battery.

The whining ramps up even louder at 40-50 mph on straight acceleration. Dissipates fast when I let off the gas. Doesn’t much sound like the Nissan CVT whine. And there’s no slippage or clunking, rattling. I think I can rule out a wheel bearing given what I’ve heard on You Tube. I’m still perplexed that this car needs a rebuild at 97,000 miles. I’m in denial.

 

If there’s an electric motor on the CVT and it’s failing with a whiny noise, wouldn’t there be a code associated with the CVT?

My repair shop is only diagnosing the problem apparently based on “shavings in the fluid” and the sound of the whine. They didn’t take it apart and do a visual inspection of the CVT. There are no error codes on the dash either. Car runs great except the noise. They just drove it 50 freeway miles so it would pass electronics on the smogging and I had them check out the whine while I was in there.