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12-28-2015, 10:32 AM | #1 |
Drives: Vitz '06 1.3L CVT Join Date: Dec 2015
Location: Malta
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Does the CVT have a torque converter?
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.
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12-28-2015, 06:58 PM | #2 |
Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008
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I don't see how it uses a belt.
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12-28-2015, 07:46 PM | #3 |
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Thankfully, the US and Canadian versions don't use the CVT.
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12-28-2015, 08:25 PM | #4 |
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Yes - The CVT does still have a torque converter.
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12-28-2015, 08:27 PM | #5 |
1NZ-6spd
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12-29-2015, 05:57 AM | #6 | |
Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008
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Quote:
I wonder what the rationale is for using TC on a CVT? Seems like an idjit idear.
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12-29-2015, 08:02 AM | #7 |
1NZ-6spd
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12-29-2015, 09:14 AM | #8 | |
Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008
Location: nj
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Quote:
Do other cars with CVTs use TCs?
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12-29-2015, 09:17 AM | #9 |
1NZ-6spd
Drives: '05 6-Spd Vitz RS Join Date: Oct 2008
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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. |
12-29-2015, 10:50 AM | #10 |
Drives: 2009 Base Hatch 2 Dr Auto Join Date: Dec 2008
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How has the reliability of the CVTs been? I would imagine there have been problems.
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12-30-2015, 01:40 AM | #11 |
Drives: 2014 Icon+ 1.33l Multidrive Join Date: Nov 2010
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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. |
12-30-2015, 03:34 AM | #12 | |
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Quote:
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.
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12-30-2015, 10:42 AM | #13 | |
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Quote:
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12-30-2015, 10:50 AM | #14 | |
Drives: Vitz '06 1.3L CVT Join Date: Dec 2015
Location: Malta
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Quote:
I don't see how that's relevant. Thanks for a direct answer. |
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12-30-2015, 11:14 AM | #15 |
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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. 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.
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12-30-2015, 11:29 AM | #16 |
1NZ-6spd
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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? |
12-30-2015, 02:43 PM | #17 |
Drives: Vitz '06 1.3L CVT Join Date: Dec 2015
Location: Malta
Posts: 6
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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.
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