CVT's - trannies

[D60]

Anyone like these fawking things? I can't stand 'em, but what really scares me is that soon you won't be able to buy a car without one.

I first had experience with one in the late '80s in a Subaru Justy. It was kinda of a one-off concept then. It sucked, revved a lot and went a little.

Couple years ago drove a Nissan Murano with one, thinking surely they had improved upon the technology. Nope, they still suck. Real rev happy, and that's about it.

Last year drove a Ford Five Hundred w one. Still sucks ass. Revs more, doesn't go any more.

It's bad enough you can't hardly buy manual trannies anymore, soon you won't even be able to buy an auto that you can at least "shift".

Now I see Nissan is all happy to be putting them in their Maxima and apparently Honda is using them in some of their Civics, at least the hybrids.

Does anyone like these things? I fawking hate them.

I know snowmobiles use a similar concept, but it's an entirely different application and snowmobiles run at much higher rpm's on a regular basis.

Mark my words, in 15 years your tow rig w a CTD will have CVT (which will fail just as regularly as stock autos fail behind diesels now, but that won't stop the OEM's from doing it)

My apologies for polluting shit chat w something that resembles tech

[mondtster]

They work great in snowmobiles and I think the concept is good for cars but I don't think they have a place in them.

I believe the big reason that you are starting to see them in cars is for emissions control and fuel mileage. I bet it will take quite a while for it to really catch on or ever be implemented in high horsepower cars or heavy duty trucks.

[krawlr]

Might be cool if you could control it manually.

[mondtster]

Originally Posted by krawlr

Might be cool if you could control it manually.

Or at least tune them mechanically like you can on sleds. When set up properly, the snowmobile clutches work awesome.

[irjpr]

for those of us not in the "know" here are they running a two clutch belted setup like a sled??? What type of CVT are they running?

I don't mind stopping and throwing a new belt on the sled, but if I had to stop my truck on the freeway to throw a new one on... thats a little different.

[Tolly]

i have one in my quad. it works great.
Until the belt breaks :-(
Wonder if you will need a belt kit to carry around in your car like we do for the quads?

[45acp]

I like the idea if i had a 2 stroke truck. Other than that, ill stick with my 435.

[Oxjockey]

I like them, personally.

But they do seem revvy if you don't make it obvious what you want it to do. You nail it, and it goes! But if you're just going up hill, you have to over throttle a little so it'll pick it up.

[Earl_of_Burl]

I hate the transmission. My wife has a 500 and it is gutless during acceleration. It also revs way to high for me. If you wind a motor up, it should go faster, right? Not this fawker. I guess slow and steady wins the race.

My samurai could give it a run for its money! (Not really)

[krawlr]

Originally Posted by Tolly

i have one in my quad. it works great.
Until the belt breaks :-(
Wonder if you will need a belt kit to carry around in your car like we do for the quads?

I saw a cutaway view of the Justy CVT in Popular Mechanix when it hit the market. It wasn't a rubber belt but more like a big wide timing chain.

[ScottFJ40]

Here's a ford, it looks like a chain type drive.

[Overbear]

I am willing to bet once the aftermarket gets its hands on the newer generation ones, you will see "fast climb" and "controled shiftpoint" units come out. Ones with a slider or some kind of progressive control that lets you advance it not the computer, and some kind of system that will let you hook up and go harder/faster.

[McCracken]

for the dummies...

http://www.edmunds.com/ownership/tec...4/article.html


























like me

[Mustard Dog]

I thought this thread was about chicks with dicks so I was gonna tell Welby about it.


Damn tech in Chit Chat, WTF

[bhaugen]

John Deere has been putting them in for a Few years not to on their Mid Hp range tractors.

http://www.deere.com/en_US/ag/featur...ivt_aug05.html

[0ILBURNER]

If these things are anything like the tranny in a Polaris 4 wheeler,
they bring teh Suck.


That is all.

[krawlr]

Originally Posted by bhaugen

John Deere has been putting them in for a Few years not to on their Mid Hp range tractors.

http://www.deere.com/en_US/ag/featur...ivt_aug05.html

I thought that was a hydrostatic drive.

Actually hydrostat sounds like a cool idea for a rock buggy.

[D60]

Originally Posted by Earl_of_Burl

I hate the transmission. My wife has a 500 and it is gutless during acceleration. It also revs way to high for me. If you wind a motor up, it should go faster, right? Not this fawker. I guess slow and steady wins the race.

EXACTLY!

I could do the same thing by just leaving my truck in 5th gear and pushing the clutch halfway to the floor on inclines.

[D60]

Originally Posted by krawlr

I thought that was a hydrostatic drive.

I dunno, is it? The JD link says it "provides smooth seamless shifts," and says it'll go from .03 to 26mph.

But even the HST on my Kubota has a high, medium and low, and it definitely won't hit 26mph in low or medium (of course I'm not sure it's capable of 26mph at all, but it's a smaller tractor). You pretty much have to be stopped to shift between "ranges"

[D60]

One more thing, can you get compression braking out of a CVT? My experience suggests not, or not yet.

[[Memphis]]

don't know much about them in cars but in quads they do not take water well AT ALL! Imagine in a rain storm if you hit a big puddle and water leaked into the housing have fun going no where lmfao

[bhaugen]

Originally Posted by D60

I dunno, is it? The JD link says it "provides smooth seamless shifts," and says it'll go from .03 to 26mph.

But even the HST on my Kubota has a high, medium and low, and it definitely won't hit 26mph in low or medium (of course I'm not sure it's capable of 26mph at all, but it's a smaller tractor). You pretty much have to be stopped to shift between "ranges"

From what I have read about it, it is a cvt type tranny and not a Hydrostatic. Hydro looses too much power to heat loss, which makes them ineffiecient. IH played with it in the 70's in thier tractors, with all the heat coming off the hydro it felt like you were getting fried sitting in a cab of one of them things in mid summer.

[krawlr]

I just saw an article on this one at the docs office: http://www.fallbrooktech.com/02_Demo.asp

It has balls.

[trannyboy]

definetly not looking forward to these transmissions. when they fail they are expensive to fix. what they are trying to steer the public towards is buying new cars because it is more cost effective to make payments then to do uber expensive repairs honda has been running these transmissions since the mid 90's in select vehicles and when they go they go in a big way. basically drive it till it breaks and throw the cars away. keeps the manufactures in business.

[[Memphis]]

are these trannies going to be more focused on imports or are these entering the domestic car/truck market?