Cruise Control Problem w/CVT - Taurus Car Club of America : Ford Taurus Forum
 
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post #1 of 6 (permalink) Old 08-07-2013, 10:03 PM Thread Starter
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Cruise Control Problem w/CVT

I have a 2005 Ford Five Hundred with the CVT. The trans was replaced at about 20,00 miles under warranty. The second trans went at about 110,000 miles. The current trans was not replaced by the Ford dealer. Ever since its installation, there has been a problem with the cruise control. It works good at low speeds and with very gentle grades. If it need to downshift to climb the grade, the tach will go to over 4,000 rpms. It will hold the speed OK; but the rpms will not go down again on its own even if the road is level or downhill. I can disable the cruise control and set it again and it is OK until it happens again or I can increase the speed about 5 or 6 mph and the tach will start to drop. Then if I get off the gas, the rpms drop down to the normal range for that speed. The transmission shop says that the problem is not the transmission. It is a problem with the computer which controls the transmission. Has anyone ever heard of something like this.
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post #2 of 6 (permalink) Old 10-27-2013, 01:42 AM
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Wow! I've got the same car type, should I expect the trans to go on me? Got 80k on it.
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post #3 of 6 (permalink) Old 10-27-2013, 09:47 AM
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A CVT trans basically requires lots of fluid changes and maintenance. It was the result of strict government regulations on fuel economy standards, instead of letting free market economics sort out the issue. CVT transmissions are a nightmare, and are basically a design failure. They have to slip to regulate speed, and slippage means heat, and heat means failure.


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post #4 of 6 (permalink) Old 10-27-2013, 10:00 AM
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The CVT was 'great in theory' lousy in practice

It's SHO time!


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post #5 of 6 (permalink) Old 10-28-2013, 06:57 AM
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It was an attempt to improve fuel economy by keeping the RPMs at the optimum level more of the time. A six speed auto however is pretty much just as effective, and far more reliable.


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post #6 of 6 (permalink) Old 10-28-2013, 10:20 AM
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yes cvt's only work on snowmobiles!! with a big rubber belt, actually work quite well in that capacity!

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