[ntc2000]

Discuss All CVT Problem Proton In Here.

Huy guys,

I am kristof, work for punch powertrain (cvt supplier for proton saga flx flx se exora, and the new car sold soon).
You can adress all cvt questions to me, as i consider end customers to be highly important.

Kristof.verpoorten@punchpowertrain.com

Don't hesitate.

Questions i saw:
Sound when engage D, not normal, not cvt unless you feel a firm shock when engaging, when not probably mounting.

huy all,

I am Kristof, Belgian, living in Malaysia and working for Punch Powertrain (CVT supplier) as manager customer care Proton.

You can ask me all CVT related questions.

First answer is on the Reverse sound. Don't worry there is absolutely nothing wrong with your gearbox.
We use a planetary gear set that reverses the engine movement to our gearbox. This planetary set contains small gears that run at higher rpm in reverse, that is the sound you hear. It should be in your owners manual as well.
As soon as you start reversing slowly the sound gets less.

Regards

Hey Tan,

You succesfully contacted me trough email. After meeting today in sri petaling and flashing the latest software i hope your problem will be solved. If not, you know how to find me.

To all users, i am very sorry to be late in replying. It's as tan can confirm always more effective to email me. I am currently busy to get our service center in Subang jaya up and running. I will however give the tast of forums to my foreman. You will see im appearing here soon for all your inquiries!

Just repeating: kristof.verpoorten@punchpowertrain.com to direct contact me. For those who prefer malay: fikeri.yusof@punchpowertrain.com for those who prefer tamil: jayakumar.arumugam@punchpowertrain.com!

Hope you all find your way to us so we can continue our effort to support the "for us very precious" malaysian market and proton drivers

All the best

first of all, I would like to thank for Kristof (Punch powertrain) effort to explain forummer question regarding proton powertrain problem. It is a good effort for proton and punch to have this kind of initiative to improve their customer service and product.

I create this thread to consolidate all related CVT issue for proton car - CVT2, CVT3 and future powertrain.

If there is any question regarding CVT, kindly post in here.

thank you.

[ntc2000]

hi Kristof bro,

I have several question regarding CVT for exora bold(CVT3) and saga flx (CVT2):

1) I notice that exora bold still roll back on even slight /gradual slope(not-too-steep slope). Normal auto gear vehicle only will roll back when the slope is too steep, if it is not steep enough, it's will lock at there. Is there anyway to make CVT lock it when reach slight/gradual slope? It is kinda dangerous esp for new driver.

2) A lot bashes arguing CVT from proton will end up like honda city CVT, after few year, this cvt gb will fail and it's will cost a bomb for us to replace the CVT GB. Can you describe a bit on punch CVT and it's reliability issue?

3) A lot people(those basher) condemning on rubberband effect for proton CVT compare to those conti CVT(multitronic and etc). Rubberband effect quite obvious for punch CVT.

4) Overheat issue on CVT2. There is rumours saying that Saga FLX always break down due to CVT2 overheat. Is there any solution already?


Thank you

[kristof]

hi Kristof bro,

I have several question regarding CVT for exora bold(CVT3) and saga flx (CVT2):

1) I notice that exora bold still roll back on even slight /gradual slope(not-too-steep slope). Normal auto gear vehicle only will roll back when the slope is too steep, if it is not steep enough, it's will lock at there. Is there anyway to make CVT lock it when reach slight/gradual slope? It is kinda dangerous esp for new driver.
You are correct. This is a know "issue", but is a design feature actually. Two things contribute to this:
First thing is what we call idle neutral, unlike all regular older AT's that have a constantly dragging torque converter or clutch, we open our clutch (a wet clutch, more pressure = more drag, even more pressure closes it) almost completely when you are pressing the brake and standing still. this way fuel is saved. If you release the brake a little time is needed to apply pressure to our clutch again. that is when you roll back a little, rollback only occurs on hills steeper than 10%.
secondly the engine cannot deliver a lot of power idling, when aircon is on, heavy car, on a hill, we can start closing the clutch in order not to roll back, but that will cause the engine to stall. When you apply trottle you will notice first the clutch opens a little bit so engine revs up, than we start closing the clutch, during revving up, you can encounter rollback.

What to do? use handbrake in stead of brake, this way we not shift to neutral (we only read regular brake signal not handbrake), use enough trottle, this way the engine produces engough power to close the clutch in one move.

2) A lot bashes arguing CVT from proton will end up like honda city CVT, after few year, this cvt gb will fail and it's will cost a bomb for us to replace the CVT GB. Can you describe a bit on punch CVT and it's reliability issue?

We are looking into this, we do know income in malaysia is not like europe meaning people will choose repaired or reconditioned gearboxes above new ones. Possibility is that Punch will open a local brand to recondition gearboxes and sell at prices comparable to normal AT ones. As you know our gearboxes are tested till 250000km.
3) A lot people(those basher) condemning on rubberband effect for proton CVT compare to those conti CVT(multitronic and etc). Rubberband effect quite obvious for punch CVT.


Rubberband effect is from CVT's that existed 30 years ago, we use a steel belt so not applicable.
4) Overheat issue on CVT2. There is rumours saying that Saga FLX always break down due to CVT2 overheat. Is there any solution already?

We use a wet clutch, when you would move uphill at very low speeds it would slip almost constantly. We cool this clutch with CVT oil, this is pumped trough the clutch by our CVT pump, this pump is directly connected to the engine. So yes, when not driving as you should with a CVT (and you cannot know this as this is new) you can overheat it. Please compare to manual, if you would keep it on a hill only using the clutch you would burn it.

What to do? avoid long slipping clutches by applying enough throttle when moving uphill, the engine will produce enough power for us to close fast without long slipping period. Shift to N when you can, this will have a cooling effect on the CVT, if possible in N apply little throttle till lets say 1500rpm, this will rev up the pump and increase cooling.
these tips are only for extreme conditions! all other condition drive as you want!
Our CVT's are tested under extreme temperatures! Worst case scenario clutch will open, resulting in no drive as we measure temperature and in order not to break the CVT we will open clutch. You will have to wait a few moments, key on and off and there you go again, this is no breakdown!

Thank you

[Tourist]

I sat in a Bold and notice when moving away from stationary (not very aggressive driving), there are lots of dull humming or booming noise coming from the dashboard or gear lever area. It goes away when car is up to speed.

But I distantly remember sitting in another Bold before and don't recall hearing these noise in the other Bold. Are all Bold the same or some are simply quieter than the others?

[kristof]

I sat in a Bold and notice when moving away from stationary (not very aggressive driving), there are lots of dull humming or booming noise coming from the dashboard or gear lever area. It goes away when car is up to speed.

But I distantly remember sitting in another Bold before and don't recall hearing these noise in the other Bold. Are all Bold the same or some are simply quieter than the others?

It's different per Bold, it is dashboard assembly I am afraid. Primes seem to be even more sensitive than bold.
Actually engine is loaded at that time and as RPM is low it will vibrate, as a result the dashboard will vibrate and that is what you hear. This should be an easy fix for a dealer in my opinion.

[Tourist]

It's different per Bold, it is dashboard assembly I am afraid. Primes seem to be even more sensitive than bold.
Actually engine is loaded at that time and as RPM is low it will vibrate, as a result the dashboard will vibrate and that is what you hear. This should be an easy fix for a dealer in my opinion.

Is that so? I was guessing:
1. Material resonance which is not easy to fix
2. Characteristic of all CVT at start of move because some people told me "they are all like that".

If they can get me a Bold without those booming/whining/straining noise (not sure how to describe it), I might just buy one of them.

[kristof]

Is that so? I was guessing:
1. Material resonance which is not easy to fix
2. Characteristic of all CVT at start of move because some people told me "they are all like that".

If they can get me a Bold without those booming/whining/straining noise (not sure how to describe it), I might just buy one of them.

Take it from an expert that this has absolutely nothing to do with cvt, mine for example has no noise at all! Its quite simple, buy the car, when you get it from the dealer, dont take it untill problem solved.
Chances are quite small. If you would leave a great drivers car like this only for such small issue it would be a shame.

[yellowbox]

Hi kristof,

Questions related to Exora CFE:

1) You have mentioned that the clutch is almost completely open while standing still with D engaged, is this the prime reason of slight lagging when slowly pressing the gas to move?
2) Could you give some advices/tips in using CVT when going uphill (e.g. Genting Highland)? Also does it have engine-breaking effect when coming down?

Thanks.

[ntc2000]

Is there anyway to avoid CVT failure like honda city/jazz? Any special thing need to take care in order to longer the lifespan of punch CVT?

need your expertise how to take care on punch CVT GB.

thanks

[kristof]

Hi kristof,

Questions related to Exora CFE:

1) You have mentioned that the clutch is almost completely open while standing still with D engaged, is this the prime reason of slight lagging when slowly pressing the gas to move?

yes, if you release the brake and immediately press the gas, this is the case. It is always better not to press the gas immediately unless you have to (uphill), you will notive less delay. That it isn't superagressive at launch (if you would mean this by lag) is calibration, it is to preserve both engine and CVT. it is called torque reduction, the engines power delivery is minimized, although full trottle.

2) Could you give some advices/tips in using CVT when going uphill (e.g. Genting Highland)? Also does it have engine-breaking effect when coming down?
yes it has an automatic engine braking, but only when trottle completly released. Even more engine braking can be applied by putting transmission in L mode. Also for uphill L mode comes in handy, lower ratio, more pulling power!Thanks.