what's the use of "N" in a AT?

**chua_riwap** · November 10th, 2015 12:56 PM

Originally Posted by claRkEnt

N pag gabi... D pag araw.

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N pag gabi... D pag araw.

Naku, hwag ituro yan sa mga ta ngang driver na sanay sa MTs.

Ano ang N? "Night!"
Ano ang D? "Day!"

Naloko na....

**ClaNker** · November 10th, 2015 12:57 PM

Originally Posted by radz15

Actually di ko naman pinipindot baka lang need pindotin. Hehe pero ok lang ba na laging nilalagay ko agad sa N kada matatrapik ako saglit. Kasi yung ibang driver na nakikita ko kahit 30mins hindi nagalaw nasa D padin at nakatapak lang sa brake.

30mins na naka engage ang gear at full stop?! Ouch.

**XTO** · November 10th, 2015 01:02 PM

maawain ako sa torque converter at sa brake light.....

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**enjay72** · November 10th, 2015 01:36 PM

Originally Posted by radz15

Actually di ko naman pinipindot baka lang need pindotin. Hehe pero ok lang ba na laging nilalagay ko agad sa N kada matatrapik ako saglit. Kasi yung ibang driver na nakikita ko kahit 30mins hindi nagalaw nasa D padin at nakatapak lang sa brake.

nakakangalay sa binti yun 30mins naka foot brake. baka naman handbrake?

sana pwede ang N kahit sa incline o di patag na daan para no need to brake hehe. may sasakyan na ba na ganito?

**radz15** · November 10th, 2015 02:22 PM

Originally Posted by ClaNker

30mins na naka engage ang gear at full stop?! Ouch.

Oo gulat nga ako ayaw nya lagay sa neutral at mag hand brake.

**dct** · November 10th, 2015 03:29 PM

Originally Posted by enjay72

nakakangalay sa binti yun 30mins naka foot brake. baka naman handbrake?

sana pwede ang N kahit sa incline o di patag na daan para no need to brake hehe. may sasakyan na ba na ganito?

N + handbrake

**benchman** · November 10th, 2015 09:28 PM

Originally Posted by dct

N + handbrake

ditto

Originally Posted by claRkEnt

N pag gabi... D pag araw.

**hirano** · November 16th, 2015 01:23 PM

Ginagawa ko rin is N + handbrake. Masyadong nakakangawit kapag footbrake lang gamit lalo na pag stoplight or trapik.

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Ginagawa ko rin is N + handbrake. Masyadong nakakangawit kapag footbrake lang gamit lalo na pag stoplight or trapik.

**Jeffrey Perez** · January 16th, 2016 04:46 PM

So kung normal stop and go, ok lang na wag na ilagay sa N at D nalang? Sa US kasi, they really don't bother putting it to N unless 5 to 10 minutes ka naka idle.

**newtocar** · January 16th, 2016 06:11 PM

"When the car is in D and you start the engine the hydraulic pump in the automatic transmission is not providing fluid pressure until the engine starts.

This fluid pressure is used to engage clutches in the transmission to engage first gear or reverse.

An automatic transmission does not have gears like a manual transmission which are physically meshed into one another or engaged.

The gears in an automatic transmission are always engaged or locked in but they are coupled to the drive shaft by multiple different clutches that are selected either by you or automatically. This is called the planetary gear and clutch system and it is very difficult to conceptualize.

In an automatic transmissions N is actually the same as D in that none of the clutches are engaged except in D there is a mechanical connection to an internal transmission brake. This brake has nothing to do with your wheel brakes and it come on mechanically so the engine does not need to be running for it to work.

In D when you’re at a stop the main forward clutches are engaged and the torque converter is providing pressure to rotate the forward gear but it does not rub or wear when it is doing this. Because of this resistance to free rotation in the transmission the engine begins to slow. In a modern car there is an idle control valve which the computer opens to increase air entering the engine so the engine does not stall. So there is actually more air entering and the computer senses this and adds a bit more fuel as well. So in D at the light your car will use a little more fuel than if it was in N.

Also the wheel brakes are not rubbing but are stopped and they will not wear at all while holding the forward creep of the car when in D.

The forward creep is caused by the transmissions torque converter. There is nothing slipping or wearing or heating up to any significant extent in there. It’s all done hydraulically and nothing is wearing to worry about. BUT!!!! When you are in N and the engine is turning and the wheels are stopped then for this to occur the main forward clutch is disengaged and it is SLIGHTLY SLIPPING. So the clutch plates are wearing.

So you are actually wearing out the main wear component in an automatic transmission being the clutch plates if you shift from D to N at a stop. The only advantage is your saving a very small amount on fuel.

Personally I DO NOT and I have been told by an automatic transmission engineer that you should never shift the transmission from D to N at the lights. The reason being you are wearing your clutch plates in your transmissions. It also gets hotter because of the friction and the dirtier transmission oil then contributes to other component failures.

Also it’s dangerous to be sitting there in N. You may need to drive away all of a sudden to avoid an accident but in N there is less chance of do this. You also may select the wrong setting like R when you wanted D.

If N should be selected at the lights then engineers would have incorporated this into the design. But they did not. On some fuel saving cars the engine now shuts off at the lights so obviously N is selected automatically by the computer during the shutdown period so the car can be restarted. But the engine is not turning so the clutch plates are not slipping and wearing in this type of fuel efficient car.

Also if your car vibrates in D at the lights then you need to get it serviced. It should not vibrate excessively at the lights if everything is working fine."

.....Taken from the net....