Proof CVT not worth the hassel
Proof CVT not worth the hassel
(OP)
http://content.usatoday.com/communities/driveon/po...
I think most manufactures learned the cvt lesson. And have decided with 8 and higher speed automatic transmissions, with I suppose very close ratio. Makes alot more sense to me and likely them too.
I think most manufactures learned the cvt lesson. And have decided with 8 and higher speed automatic transmissions, with I suppose very close ratio. Makes alot more sense to me and likely them too.





RE: Proof CVT not worth the hassel
More good stuff. Now why go through all this when you can have a cvt?
CVT's are like 8 track tapes.
RE: Proof CVT not worth the hassel
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Proof CVT not worth the hassel
Jay Maechtlen
http://www.laserpubs.com/techcomm
RE: Proof CVT not worth the hassel
Conventional "shifting" automatic transmissions do the same thing, albeit only below either hydraulic or mechanical torque converter lockup. If the exhaust system is loud enough, this is clearly noticeable even when the vehicle is never seen.
What I don't understand is such a strong conviction that there must be something actually wrong with it. Yes, you might have to shop elsewhere, as I already have for that and similar reasons.
Norm
RE: Proof CVT not worth the hassel
RE: Proof CVT not worth the hassel
In many respects, a CVT seems pretty attractive. An 8-speed or 9-speed automatic has lots more 'stuff' to go wrong,
For performance, if the spread is good enough, you should be able to hold the engine at peak HP through the full acceleration run. If the efficiency is reasonable, you should match or beat even a 9-speed.
Do you have numbers for relative cost and efficiency for CVT vs. 8-speed or 9-speed?
Jay Maechtlen
http://www.laserpubs.com/techcomm
RE: Proof CVT not worth the hassel
I have seen manual transmissions give warranty issues.
That does not mean the design principle is flawed.
I have seen people who will never ever buy a Ford again, Same for GM, Chrysler, VW, BMW, Honda, Nissan etc etc etc. Does that mean that all these and every other make is below market acceptable durability.
I will say it again. My brother has a Nissan CVT. He has had it for over 3 years. He does a lot of miles. He tows. He goes off road. We have hills and yes I know Aus is a flat continent, but Sydney is a hilly city and the eastern seaboard is a mountainous region. We as a family use our cars hard. We go places in family sedans that some won't go in a Land Cruiser. I found one car I had was equipped with a speed limiter as I was driving on a dirt outback road (police don't set radar traps on dirt roads).
So if the fact that I won't form a prejudice against CVTs on the spin in a competitors advertising or the anecdotal third hand evidence of an unreliable source surprises you, well I guess your in for a surprise.
If I see data from credible sources I will certainly review my opinion and consider maybe my satisfactory first hand real life experience was merely luck. Hmmm if luck is all it takes for one example of a design to work, that kinda implies failures are quality rather than design problems.
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Proof CVT not worth the hassel
I know of one individual who is fully as enthusiastic about the CVT in his 7th generation Maxima as I am hardcore about sticking [sorry] to conventional manual transmissions in my cars. He didn't get to that point by simply "putting up with it", even though he entered ownership of that car with at least a little trepidation.
Norm
RE: Proof CVT not worth the hassel
http://www.youtube.com/watch?v=VHrfrl6DqjM&fea...
At 0:47 the announcer says.....
"by far the fastest time ever on this hill. Everywhere he goes he sets records with this car"
RE: Proof CVT not worth the hassel
RE: Proof CVT not worth the hassel
RE: Proof CVT not worth the hassel
RE: Proof CVT not worth the hassel
Norm
RE: Proof CVT not worth the hassel
Regards
Pat
See FAQ731-376: Eng-Tips.com Forum Policies for tips on use of eng-tips by professional engineers &
http://eng-tips.com/market.cfm
for site rules
RE: Proof CVT not worth the hassel
A CVT in small and med sized passenger cars makes great sense. These are too small to make 8 or 9 spd autos practical and the loads are fairly small.
The key to either of these (cvt or 9spd) is the EMC. By controlling both shifting and throttle together you get smooth transitions, minimize stress, and optimize efficiency.
Yes, the steady rpm while the car is accelerating is a bit disconcerting at first. I am very satisfied with the CVT in my Subaru Outback. They have handled the "shifting" issues very well. It does not always change gradually but under some conditions makes what feels more like traditional shifts.
= = = = = = = = = = = = = = = = = = = =
Plymouth Tube
RE: Proof CVT not worth the hassel
In 10000 miles, replaced an ABS exciter ring, needs a new thermostat. Looks like the rear pumpkin has been resealed, maybe the rear CV's were replaced. In NYS, hybrids have an extended powertrain warranty, I think 150k miles.
Opposite of my benz 240D w/ a 4 spd manual and a noise pedal where the gas pedal should be.
RE: Proof CVT not worth the hassel
I would expect the Escape "CVT" to last virtually forever, as that of the Prius and others of that ilk.
I too am somewhat skeptical of the belt technology but cannot deny it works. A lot of cars and SUVs have them in this market.
RE: Proof CVT not worth the hassel
--
Dr Michael F Platten