Does the CVT have a torque converter?

[sandowian]

I've been told CVTs don't have a torque converter, but it seems to creep forward when you let go of the break like a torque converter would.

[bronsin]

I don't see how it uses a belt.

[kimona]

Thankfully, the US and Canadian versions don't use the CVT.

[CTScott]

I've been told CVTs don't have a torque converter, but it seems to creep forward when you let go of the break like a torque converter would.

Yes - The CVT does still have a torque converter.

[Bluevitz-rs]

I don't see how it uses a belt.

It isn't a snow machine LOL

They don't use a belt, they use a chain.

[bronsin]

It isn't a snow machine LOL

They don't use a belt, they use a chain.

Scooter. Its a scooter.

:iono:

I wonder what the rationale is for using TC on a CVT? :iono: Seems like an idjit idear.

[Bluevitz-rs]

Scooter. Its a scooter.

:iono:

I wonder what the rationale is for using TC on a CVT? :iono: Seems like an idjit idear.

you need a way to smooth out the changing ratio, absorb shock and also give it the ability to idle in gear. A clutch would make it too harsh.

[bronsin]

you need a way to smooth out the changing ratio, absorb shock and also give it the ability to idle in gear. A clutch would make it too harsh.

Makes sense. But then, why not just stick with regular auto transmissions? :iono:

Do other cars with CVTs use TCs?

[Bluevitz-rs]

Because a CVT can give you infinite gear ratios. So your always getting the best efficiency, or the most power when needed.

Not sure how others do it, but I'd imagine they're all similar.

Just remember all modern torque converters have a locking clutch to hold them so they don't slip when they don't require to.

[bronsin]

How has the reliability of the CVTs been? I would imagine there have been problems.

[mrpj]

Not heard or read of any problems with Toyota cvts yet.
Those who criticise them have quite probably never driven one. Used because they are far more efficient than a "conventional" auto. In fact the official fuel consumption figures have the CVT achieving a better mpg figure than a manual. See 1st line of post no. 9.
I'm getting a consistent 50 miles/(Imperial) gallon.

[bronsin]

Not heard or read of any problems with Toyota cvts yet.
Those who criticise them have quite probably never driven one. Used because they are far more efficient than a "conventional" auto. In fact the official fuel consumption figures have the CVT achieving a better mpg figure than a manual. See 1st line of post no. 9.
I'm getting a consistent 50 miles/(Imperial) gallon.

I think one thing an auto trans can do better than a CVT is handle more hp. Yes? No?

Toyota engines and transmission on average last longer and are more reliable on average than other brands in my experience. But there isn't enough public experience with CVTs to reach a conclusion as to their life. Its possible the engineers who test them know. I think I remember automobile writers saying when they came out that they wont last as long. But then again, many of these same people think a 9 speed auto trans gets better mpg than a 3 speed.

[kimona]

Not heard or read of any problems with Toyota cvts yet.
Those who criticise them have quite probably never driven one. Used because they are far more efficient than a "conventional" auto. In fact the official fuel consumption figures have the CVT achieving a better mpg figure than a manual.

I drove the Honda Fit CVT... and it was an absolute dog! The Nissan Versa Note CVT was even worse. I drove the Toyota Corolla LE CVT and it was a far better driving experience than either the Honda or Nissan. But, the Corolla L with 4-speed automatic performed so much better than LE with the CVT, and that was the single most important reason I purchased the L model. Yes, the LE got a little better gas mileage, but the price differential and driving experience wasn't worth it IMHO.

[sandowian]

It isn't a snow machine LOL

They don't use a belt, they use a chain.

What are you guys talking about? What belt/chain?

Thankfully, the US and Canadian versions don't use the CVT.

I don't see how that's relevant.

Yes - The CVT does still have a torque converter.

Thanks for a direct answer.

[CTScott]

This is a simple explanation of it from the service manual:

The continuously variable transaxle (CVT) assembly mainly consists of the following: a pulley and belt unit as a shift mechanism, a planetary gear unit as a forward/reverse switching mechanism, a torque converter, a differential, a CVT fluid warmer to keep the CVT fluid temperature optimal, an oil pump and a valve body unit for hydraulic control.

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Text in Illustration
*1 Pulley and Belt Unit
*2 Planetary Gear Unit
*3 Oil Pump
*4 Torque Converter
*5 Differential
*6 Reduction Drive Gear
*7 Reduction Driven Gear
*8 Differential Drive Pinion
*9 Differential Ring Gear
*10 Differential Pinion

Pulley and Belt Unit (Shift Mechanism)
1. The pulley and belt unit consists of a primary pulley, a secondary pulley and a metal belt applied to the pulleys.
2. In the primary and secondary pulleys integrated with the piston, the pulley groove width can be changed by each chamber's hydraulic control.
3. The metal belt consists of elements and 2 multi-layered rings which hold the elements in a belt-shaped form.

56306

[Bluevitz-rs]

I guess technically it is a belt then, except metal.

I've also been told it is actually pushed and not pulled. Does the repair manual say anything as to that?

[sandowian]

This is a simple explanation of it from the service manual:

The continuously variable transaxle (CVT) assembly mainly consists...

Thanks a lot just what I wanted! Do you have any idea where I can get the full manual for the CVT? I asked in another thread but my replies aren't showing.