As far as coasting in "n" I don't think it is a problem. Broken Automatic Shifter Cable Replacement. how to optimize fuel consumption by changing the rear differential ratio? This keeps all the bands, clutches, servos etc lubricated no worries. add a \"te\" to the above. Many hipsters do it. I can see an easier relationship in automatic stopping the engine on red lights for a few seconds to save on fuel. The next move is the changing of the gears, so the car will immediately start while often producing noise. I don't think it will make a difference on gas mileage either way. @Michael Myers, engine braking is more efficient - we discussed this here: @Bob: Your comment makes no sense. In addition to safety, the other reason not to coast in neutral … By using our site, you acknowledge that you have read and understand our Cookie Policy, Privacy Policy, and our Terms of Service. The main reason is that modern cars are already prepared for things such as this, so you're not doing yourself any favors by putting the car in neutral. Whether the fuel saved outweighs the wear and tear from the engine stopping and starting is probably not a bad question to ask at that point. The, with modern engines leaving the car in gear will require no fuel for going down hill, however, shifting it to neutral will require fuel to keep the engine going so its not as efficient as you may think, "I don't think it will make a difference on gas mileage" -- This is a sideline to the main question, but why is that?
Anytime the engine is running the front pump on the transmission is being turned by the torque converter and is lubricating the transmission which is also circulating fluid through the transmission cooler. What is "d---d" in "I’m d—d if I don’t fill you", Shifting direction is different for front and rear shifters. The threat to mechanical parts coasting at high speed is to the Automatic not the engine. Could you direct me to a site policy regarding answering old question? It may be because most of my driving is in the city. Your responses will hopefully solve our disagreement.
I coast in neutrual because MPG is still better than if it were in gear. This will reduce any shock loading on the internals. I don't see how it could cause premature failure of the transmission. I have a question along a similar line.
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As long as the engine continues to turn, even if it is switched off, it will relight without using the starter motor by merely turning the ECU back on. Richard P ? When you come back on the gas there would be a momentary backfire(lean condition) There has to be SOME fuel going into the engine at all times. The gases consumed are basically the same, so you’re not actually saving fuel. If you stop the engine completely and coast (as is often the case when being towed), you can damage the transmission. When going back into gear, if you're not rolling up to a stop sign or red light or similar, it may help to increase the engine revs a little to match the revs the vehicle would be doing at that road speed. Get Driving News Daily updates with unique motorist news & views delivered right to your inbox! id like old man to explain to me Just how in the world Engine Braking stress's Rod Bearings????????? It is fine to coast in an automatic in neutral as long as the engine is running. Another good reason not to coast in neutral is because of loss of control. This field is for validation purposes and should be left unchanged. He typically crests the hill at 70+ mph and is doing 55 when he pops the clutch to restart the engine. for no reason. The reason is that the transmission circulates fluid for lubrication and cooling, and this circulation is powered by the engine. Some auto transmission vehicle drivers have the wrong impression that coasting downhill while in neutral mode reduces the consumption of fuel. I’ve owned cars with automatic transmissions from the 1960’s, 70’s, 80’s, and 90’s. By the way, I see how engine braking is better when the hill is steep enough to maintain speed (you can keep the engine turning with no fuel), but not on borderline hills where you'll quickly lose speed if you don't either go into neutral of hit the accelerator. Wiki for consequences of axiom of choice? The reasons are simple: by shifting gears while your car is still moving, you’re wearing out your car’s transmission because you’re using the very same transmission to stop the car (instead of using the brakes).
Where as at idle, and in neutral, all cylinders are getting fuel to keep the engine running smoothly. If you stop the engine completely and coast (as is often the case when being towed), you can damage the transmission. In modern automatics, you should go downhill in D, not N. The reason is that the ECU/TCU is programmed to detect situations in which the wheels are driving the engine (e.g. Drivers love it, and there are good justifications for that.”. Distinguishing non-isomorphic groups with a group-theoretic property. The last disadvantage is that your belt and gears will be negatively affected by the friction you’re creating. Rotating the drive wheels (coasting or being towed) without the engine running causes … Don’t put yourself and other people in danger, keep your car’s pieces intact, and drive safe!
This is the worse mistake you can do, as you can damage or destroy the “locking pin”, an element that’s essential for your engine because it helps it run. Some are not, hence, neutral combined with motion is not a good thing.
Now for this nonsense about fuel being turned off when you let your foot off the gas-I would like to know who thought that one up. Won't this cause the emission sensors to foul?? Aloha Diesel Kahunas, I was wondering if anyone with automatics ever coast in neutral down hills. It’s a myth. Safety, comfort, and ease of use. Engine braking in an automatic: Does it save fuel? Gearing to Park without Completely Stopping. I read the manual which says it's not good for the trans to coast in neutral. The opinions expressed in posts to the NMA Blog belong to the author and do not necessarily represent those of the National Motorists Association. To me, that seems like it.
As for saving fuel, it depends on the vehicle, carbie cars, and early injected vehicles, it will definitely save fuel. Changing into and out of a drive gear at speed in an auto box is not recommended. Is "their" just a misspelling of "they're" in this quote of Melville? To subscribe to this RSS feed, copy and paste this URL into your RSS reader. Dear Alex, please refrain from digging up these ancient topics as your answers provide little additional value to the original question. Coasting in neutral keeps the engine idle, similar to when your car is on the road but not moving. While your information is good information, it really doesn't apply to the question at hand. But someone told me recently that being in neutral while moving can cause an automatic transmission to overheat, since the fluid is not being circulated. Just simply give your fuel a few minutes to successfully reach the transmission and the other parts. Never coast downhill in neutral: Modern automatic transmissions cut fuel to the engine on their own, so putting your car in neutral won’t save you any gas. Actually Ted, it's 14.7:1 I don't coast for long periods of time but when I come up to a red light I will push it up to "n" Some of the lights around here are two minutes long-this puts a strain on the trans. During the winter season, the oil thickens, and its movement is slowed down. It only takes a minute to sign up. Automatic transmission: Is shifting to neutral while approaching stops bad? Motorists Vote 2020 Ballot Initiatives: NMA E-Newsletter #612, Compunction to Shame Motorists needs to Stop, “Driving While Black” Billboard Shines Light on City Ticket Records, Flood Car | What to Do and Damage – Buyer Beware, Driverless shuttle launches in downtown Tampa, FL, Explaining Why the Six Levels of Autonomous Driving are a Mess, Electric Car Growth Sparking $300 Billion Budget Loss for States, 60% of cars sold in Norway last month were electric, Bismarck, ND police testing hybrid squad cars, 6 Things to Avoid While Driving an Automatic Transmission Car. I think you misunderstood what OP is trying to achieve, which is keeping enough momentum while driving downhill so as to maintain speed without pressing the accelerator. Should I change automatic transmission fluid JUST because it's brown? We filled up on return and she complained at $13 it was using too much gas.
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