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Sedans Volkswagen Passat VW Passat TDI
1030 messages, Last post on Dec 05, 2008 at 8:09 AM
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Replying to: tomatopie (Aug 08, 2005 8:51 am)
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Replying to: tomatopie (Aug 08, 2005 8:51 am) as for driving a 5-speed and stepping on the clutch & coasting, if anything that is more counterproductive and wasteful of fuel than doing it with an automatic/slushbox. for the passat tdi it's an smg transmission not a slushbox so you are doing essentially the same (wrong) thing. also your "but of course, taking your foot off gas" comment seems to be equally wrong. however your third item, a question about the auto trans, is a better one. so you don't get a "three-fer" of wrongness for your post ! go for it next time if you dare - what other wild & wacky driving techniques do you have. to answer your question: IF volksy programmed & designedtheir trans properly, it should be fine to go in and out of neutral at any speed. however that's a big IF - you may be aware of the BUCKING issue on these passat TDIs - they all do it - but the gassers do not - i consider it an indication of a design/programming flaw. as for the final question, a way to go from 1,2,3,4,5 to N, that's a good question, i have actually wanted to do that on rare occasion such as stopping in a parking lot. but not for the reasons you are doing it. happy & safe motoring to ya! if you are going to use driving techniques wasteful of fuel, at least you are doing it in a diesel and wasting that much less fuel ! you go!
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Replying to: cosmo (Aug 08, 2005 12:02 pm) How would that be different from idling in neutral at a stoplight? Either way, the engine is idling and the transmission disengaged. |
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Replying to: cosmo (Aug 08, 2005 12:02 pm) Can you elaborate? The clutch is disengaged, hence no friction or wear on the clutch. What is the throw out bearing, and how would this driving style affect it? I drove my 5-Speed Legend 200,000 miles using that technique. And never once had the clutch serviced. Appreciate your insights.
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Replying to: elias (Aug 08, 2005 4:45 pm) as for driving a 5-speed and stepping on the clutch & coasting, if anything that is more counterproductive and wasteful of fuel than doing it with an automatic/slushbox. also your "but of course, taking your foot off gas" comment seems to be equally wrong. however your third item, a question about the auto trans, is a better one. so you don't get a "three-fer" of wrongness for your post ! go for it next time if you dare - what other wild & wacky driving techniques do you have. I am happy to learn from others here. It's good stuff. Sebring made the case as to why a car coasting in gear uses less fuel than one out of gear. However, you have to judge the circumstance, no? If you are intending to slow down (for a light, toll booth, etc) then it makes sense to take full adavantage of engine braking while also saving fuel. But if your intention is to maintain momentum and let gravity work for you, coasting out of gear is going to cover more distance on less fuel than coasting in gear and suffering engine drag. Now, it still may be a bad habit in the Passat if there is some science to demonstrate that it is harmful to the car to go in and out of neutral while moving.
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| Have heard about the 7500 miles needed for registration clause, but suppose I buy the TDI out of state, with residency in that state of purchase and then move to California say within the first 2000 miles. Any help? Thanks. | |
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Replying to: tomatopie (Aug 09, 2005 4:42 am) |
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Replying to: tomatopie (Aug 09, 2005 4:35 am) There are a multitude of discussions on this and related topics in other forums. So as not to offend our host, I suggest doing an Internet search if you are curious. Information not contained in other forums is also available, and I'll provide some samples for your review. This one address the practices of shifting an auto into neutral at traffic stops and holding the clutch down at traffic stops. http://www.popularmechanics.com/automotive/sub_care_clinic/1675807.html?page=2&c=y This one addresses a warning in the operators manual for Allison automatic transmissions. See page 7. I assume the torque converter style Tiptronic is similar. http://www.allisontransmission.com/servlet/DownloadFile?Dir=publications/pubs&FileToGet=OM- 1334EN.pdf Tom and Ray seem to expound endlessly on this topic, and here are some samples of their offerings. http://www.cartalk.com/content/columns/Archive/1996/September/05.html http://www.cartalk.com/content/columns/Archive/1994/May/07.html http://www.cartalk.com/content/columns/Archive/1995/March/18.html http://www.cartalk.com/content/columns/Archive/1995/November/09.html http://www.cartalk.com/content/columns/Archive/1993/April/10.html http://www.cartalk.com/content/columns/Archive/1995/October/07.html Bottom line, as already pointed out, the practices of coasting in neutral and coasting with the clutch down are both illegal. That may explain why DKW 3=6's and Rambler Americans with freewheeling overdrives are no longer made. 
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Replying to: cosmo (Aug 09, 2005 7:08 pm)  Much appreciated! I had heard some of these things before, but always second-hand. And I figured they were as reliable as "don't go swimming after you eat" and "add ten pounds of tire pressure for long trips." Consider me educated on this topic, even though I logged over 400,000 miles between my Civic and my Legend and never had an issue. My two cars are hardly a statistically valid sample.
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Replying to: tomatopie (Aug 10, 2005 4:19 am)
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