Toyota Grande CVT Gear Problem

[haseeb.basharat]

to sum up i believe gentleman is overly senstive to feel CVT SHIFT JERK,

I agree with this. My car is 98k kms driven. I don't get bother from it at all. I don't drive at 40km/h consistently.

[capsat]

Bhai kisi kay pass itna time nai hota wo wehum ki waja sey thread khol kr beth jae or discussion or debate krey.

don't mention time check @TINTIN1 you will know what kind of vayla class farigh people exist over this forum

[Xulfiqar]

I have used valvoline cvt fluid to cure a similar sickness in nissan cvt and also used an additive in some. It helped in a few cases.

In most cases, i had to repair it mechanically.

90% of owners keep on driving with this as repair is very expensive.

[haseeb.basharat]

Atleast 5 drivers have test drove my car and all have said there is problem but nobody knows where it is coming from. Anyways thanks for your time and discussion appreciate it.

Please check plugs too. They were culprit in my case at 22k kms. It was jerking at 100km/h too. Always at low rpms.

[rajaatta]

You are far far away from me else i would have rectified your problem if its just the VB issue

[ehalin]

Some people started criticizing my point of view earlier above. But I request if some sane people are here to give it a thought. It is quite possible that it may save some people from the same fate as OP is going through.

I am still not convinced that this CVT from Toyota requires so frequent oil changes i.e., just 50,000 kms. Suzuki transmissions manufactured back in 1970s used to have 40,000 kms oil change intervals.

Toyota does not recommend same oil change interval in international markets for the same CVT transmission. Early Toyota Indus manuals for grandes delivered in 2014 and 2015 did not have this 55000 kms change interval. Toyota has been very cunning. They were giving 50,000 kms warranty in 2017 and asking people to change CVT fluid exactly at 55,000 kms. It seems like they already knew that changing CVT oil even by their own 3S workshops can create problems and if the cars are under warranty, it could raise many warranty claims. They had very smartly generated extra business for their 3S workshops without any risk of extra costs due to warranty claims.

For the same auto cars for which the manual says that replace transmission fluid at 55000 kms, the dipstick says otherwise i.e., no need to replacement. It means Toyota Indus forgot to change this on the dipsticks. Who cares?

Even at 55,000 kms, you are changing only 30% of the total CVT fluid. It is simple mathematics; then the next fluid change should be at 55,000/3 = 18000 kms. Why the second change is again recommended next 55,000 kms? Is the oil replaced by the 3S workshops of better quality?

I still feel changing CVT oil in normal driving conditions even in Pakistan at 55,000 kms is an overkill and you are taking a bigger risk if your mechanic does not know anything about the CVTs. A more realistic interval is about 100,000 to 150,000 kms and later you can switch to 50,000 kms as you are replacing only 30% of the fluid.

[captain.mujtaba]

I know that transmission's that I'm going to give examples of are not CVT but still just to give an idea of transmission oil change. Suzuki recommends the first manual transmission oil change at just 5k Kms and then after every 40k Kms whereas honda, recommends first manual transmission oil change for city at 70k kms. Also, if I'm not mistaken, Honda also recommends to change CVT transmission oil at 50k Kms for the international variant

[haseeb.basharat]

you can switch to 50,000 kms as you are replacing only 30% of the fluid.

You can change almost 80-90% of oil if you have two boxes of 4L cvtfe oil.
It will involve 3 times of oil draining and refill.
Cvtfe oil just cost 6k these days. I'm changing cvt oil at every 30k kms or a year. 98k driven here and cvt oil was changed like three times. Toyota cant do oil leveling with respect to temperature: so I did it myself by keeping gear at 35-45 degree celcius, and making ecu go into temperature check mode. What's wrong with changing oil earlier when it doesn't cost much. Toyota K313 cvt alone costs equivalent to 2zrfe engine.

[anon36782927]

This post was flagged by the community and is temporarily hidden.

[haseeb.basharat]

sir ap ko ALLAH bohat dai. ap rooz transmission oil change karayn

but with 6 cars in family oldest being 2010 we have so far changed transmission oils only twice aur once flushed break fluid as per

There is a difference between a transmission oil and a cvt oil.

[haseeb.basharat]

If anybody needs proper method to change cvt oil of grande/1.8cvti then here is a pdf file for it.

2014-16 TRANSMISSION CVT Fluid change - Corolla (K313).pdf (930.1 KB)

[pwuser151804282637]

Aslamoalikum bhai jan , Congrats to me
Problem finally diagnosed after alot of Struggle and spending time on Internet and Doing some stuff on Techstream.
But what makes me sad is that such advance technology and ecu was unable to detect the problem. I had to figure it out manually. I will write detailed information and will upload Pictures along with soon inshallah.
The problem is related with Torque converter.

[pwuser151804282637]

Attention pls bhai , Problem diagnosed.
I tried to my fullest to explain you my issue but unfortunately failed. You dont believe me but i hope you will believe techstream information now.

[haseeb.basharat]

Please share the solution of your problem.
@bridgedoctorali this is something new in case of k313.

[autophile]

Subscribing

[pwuser151804282637]

So here are the Following details :-

Some background information

• No check engine Light.
• No trouble codes.
• Maximum fuel efficiency.
• All Fuel systems ok
• Car Judder or shakes badly around 20-30-40 speed
• When u brake sometimes car jumps forward for a second.
• Sometimes its worst sometimes its Normal.

So its Torque converter lockup problem. It seems like the torque convertor Locks and Unlocks without any proper pattern. The car jerk worst as soon as TCC lock unlock and lock so the car shakes like its 1950 model.

Attached is Pdf file i found on internet (toyota Camry at TSB) i know they r Differnt technologies but The problem is with tcc so doesn't matter alot , I did the same test as it is And found the results are same. Slu soleniod and Lockup should be directly related but sometimes they are showing inverse response. (Slu is on and lockup off or lockup off slu on etc)

Now lets come to my personal test and observations :-

In active test tab There is option to control lockup :-
During drive i run that active test :- at 60 speed.
I switched lockup off, all was fine. As soon as i hit it Lock on the car jerked and shuddered like it does always. This shows yes its lockup problem...

I have found on internet that usually cars lockup tcc at 40 to 60 speeds but while checking live data i found the tcc start lockup at even 10-20speed. That is quite strange i guess.
The cvt temp was also very good 180F.
Locking and unlocking again and again at 10-20 speeds this seems very strange to me.

Sometimes on lock unlock car doesn't jerk at all - But sometimes it shakes worst i think this happens when Slu and lockup are Working inversely.
When we

Cvt pressures , all calibration , values , G sensors , Fluid flush oem way , temp ( All is fine and done ).

Few days back i was not the member of pw forum and didnt even know about tc , i spend days and nights doing this all stuff And now i hope the Information i have provided must be enough for any professional to get to The root Reason.

All detailed videos of live data and ss recordings can be provided if its not enuf (attached files)

Toyota_Transmission_Fluid_C.pdf (655.4 KB)

Please email :-
Faizan.ahmed.biz@gmail.com

[Xulfiqar]

I told you above that CVT TCC locks up at initial take off speed too (20 kmh) - its part of design.

The TSB you are seeing of camry is not applicable to CVT due to shift logic difference.

You can try to clean the TCC stroking valve in the valvebody to help this (as mentioned above that you will need to do mechanical work to repair this).

[pwuser151804282637]

And what about if its locking up at 13-15 speed. Still a feature? Strange man. If that's real and Normal then i drive 90% of the time in traffic below 40 50 speed. It might have lock unlock a thousand time in one trip.

[Xulfiqar]

Yes it will engage at initial movement speed of 15 to 20kmh

This is part of cvt design, you will notice this feeling like your car is being towed, there will be an initial delay and then a slight pull jerk as the tcc starts to lock, (its not a 100% lock)

[crude101]

55k or 2 years
Grande ka manual kholo