wat kind of weird and loud sound it is? normal cvt sound is already loud and weird for a car..

Wow, good that they manage to find the problem.

So far I have seen many of the gearbox failed due to the pulley being damaged. Last time I used to think that the clutch would give up first but apparently not.

bro any prevention on pulley damage? Does parking in P without pulling handbrake does harm to the gearbox?

I sent to COSE in Shah Alam beside KESAS highway. So it takes 2 weeks for the gearbox replacement? I thought 1 week is already long and asked the guy to speed up the works. Looks like I now have to anticipate a longer time to have my car back.

If you car is year 2014, that means that the newer Preve also have this gearbox issue. I wonder what is the cause of the gearbox going kaput. May I ask how did you parents get to know that the transmission is problematic? Did your parents found out when they discover some symptoms such as louder sound from the gearbox transmission, or the service centre found out that the gearbox is broken when the car is sent for servicing?

I am not referring to the normal CVT sound during acceleration which is already loud in nature. That is the inherent characteristic of the Preve's CVT, the low-frequency whining sound from the transmission when the car is accelerating. The sound is normal for a car that does not have any problem.

The loud and weird noise is a separate sound, an extraneous (additional) sound from the transmission which sounded REALLY LOUD and audible. It sounds like "Wooo wooo wooo" when you step on the pedal. The sound will last for about 4-5 seconds, then it will eventually disappear by itself, back to normal.

I tried to find a video on Youtube that may show the sound but cannot find any. Instead, I found a more serious video which shows a more serious problem :-

Yes, it is good that they actually acknowledged that the gearbox of my car is broken. I am expecting that they cannot find any issue with the CVT of the car as I didn't think about the loud and weird noise from the transmission as something that is too serious since the noise comes up intermittently, not every time. I can still drive the car as normal even though the sound comes up. I only knew that the faulty gearbox is a serious case when my request to drive my car back home is rejected due to safety reasons. I have to leave my car at the service centre even though it will take some time for the new gearbox to arrive at the service centre, after a report was made, which I understand will take several days.

Where have you seen the failed gearboxes due to pulley being damaged? At the service centre? Is it the Preve Turbo?

Is there anyone else who have had problems with the CVT gearbox of the Preve Turbo? Anyone else had the gearbox replaced at the service centre?

I am trying to figure out if there are many cases of these gearboxes going kaput which may shed some light on the reliability of the transmission in the Preve Turbo. So far there are 3 owners who have had the gearbox replaced in less than 3 years.

there was a very very distinctive load whining noise at low rev <1500-2000 RPM

Took it to the local SC here and within 30 second,they just straight up tell me the gearbox is kaput

It is still drive able but i wouldn't place my life on it

mine got this whining noise at 30-50km/h, but i tried new iriz, their CVT has no such whine at all. Mine is like woo woo woo when lift pedal at 30-50km/h. Even when step pedal also got abit but not as loud.. i didnt know how a normal cvt whine would sound like..

This post has been edited by ben3003: Aug 13 2015, 05:09 PM

i would say it have the sound in the "first gear" range. After >30km and into the "2nd gear range" no such noise at all

The sound is like metal grinding metal kind of sound

oh ok.. i cant find any youtube video about preve cvt whine..

That's my classmate's car.

I seen it on Prevec Facebook pages sometimes. Usually the CFE ones will fail sooner because of the torque it stresses onto the gearbox.

I finally managed to find a video that shows the closest noise that I experience with my car.



Fast forward to 0:30. The background sound from 0:30 to 0:42, about 12 seconds. This sound is almost similar to the sound of my car's transmission. The only difference is the driver in the video above is reversing the car in R, whereas I am accelerating the car in D.

Yes, the noise from the transmission will be heard when the car is accelerating from standstill at low speed to about 30-40km/h, then the sound will disappear.

Is the noise that you experience in your car(or your parents' car) is almost like the sound in the Youtube video above?

ya

my car did the same noise

High pitch metal grinding sound

It appears that your classmate's car has major damage in the engine, not the transmission. Are there many cases of the Turbo engine getting into this state? Is this an isolated case, or there are other cases of this engine malfunction?

Yikes, I am getting less confident on the car after seeing all these videos on Youtube. There are several more videos from different Preve Turbo owners, probably a lot more who don't post videos (like me).

Oh wow.. My car has that sound when reversing too.. I thought it was normal? And I do have an aeroplane sound when accelerating? It will be gone with higher speed though.. Is this normal? Also it tends to rev higher after cruising at high speed.. Say u r at 170 and approaching a tol, u get slow down and get into smart tag lane, after getting pass the barrier, u step on the pedal LIGHTLY, the jerk will have a bad jerk and rev more than usual with that throttle input.. I have never driven another CVT other than a Vellfire. Vellfire's CVT has no such things though.. Looks like it's time to get it checked at a service centre..

Better get your car checked to be safe. Aeroplane sound is normal and is inherent in the CVT I believe. It is the additional loud "woo woo" sound from the transmission. Once you hear it, you would know that it isn't normal and there is something wrong with the transmission. In my case, it was intermittent and comes up once in a while, not always, so I didn't take it too seriously. Only after I sent it to the service centre did I know the extent of seriousness, in that the gearbox of the car is damaged.

I have driven my previous car, the Nissan Sylphy which also comes in CVT for more than 5 years in the same manner as the Preve Turbo with frequent sprints sometimes RPMs climbing high above 4000 in Sports mode. There is no issue with the transmission at all, no change in character even for a tiny bit. The acceleration remains silent and super smooth. From this experience as well as some other cases as shown on Youtube, I am beginning to feel that the CVT in the Preve Turbo isn't too robust or reliable. The fact that the transmission can become damaged even though it isn't subjected to spirited drives as in hard acceleration or high speed cruising suggests that the quality of the CVT is not very good.

This post has been edited by SportyHandling: Aug 13 2015, 08:36 PM

just check to be safe


best thing now is after gearbox change, i got insane vibration throughout the chassis . Time to send to SC again after 2 weeks driving. Somehow i think they botched up the job and now need to claim for vibration

I just happened to log in n saw these comments..so I thought I share my experience with my 2012 first batch preve...few months after buying my engine cylinder head cracked while driving n towed to proton and they replaced the engine...took about 1 month plus replacement car given...

everything went fine and after tht the car would jerk when I drive slow and feel like the gear slipping..went twice and they retune or reflash the ecu and it was ok but after sometime it felt the same.. learned to live with it..

then one day the aircon was not cold went and checked everything connected to aircon was fine but air not cold..it spent 3 weeks in workshop trying to pin point the source and apparently some wiring problem..

my driver seat is worn out in 3 years and emit some sort of "creaking" sound everytime I sat on it or moved while sitting..morning when I start and drive there are lot of vibration in the dashboard....

the engine sounds so rough inspite always using full synthetic oil..the absorbers has already worn out and due for replacement...as for the vibrations I am sure the engine mountings has to be replaced..

the engine will die off while I reverse on uphill..sometimes as I slow down for touch n go and when I press accelerator there will be a violent jerks which I feel on my floorboard before the car actually moves on....

the cvt fail indicator and airbag indicators will sometimes light up and I need to go proton to reset..twice already..

the gearbox feels much better after my major service in 60,000km and they charged me RM1500 for the service and I noticed they changed lot of gearbox parts....

honestly I feel frustrated and disappointed with this preve as so much of my time wasted in proton workshops..i really don't take this car outstation as always one after another problem crops up..