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npinks



Member Since: 28 Jun 2007
Location: Ls25
Posts: 20090

United Kingdom 

you loose power basically, i have done this a couple of times thinking i was in command shift

keep meaning to look in the manual for the official ruling on going from drive to neutral but haven't atm Former Mod/Member, with the most post & Chicken George Arch nemesis

Post #58920 10th Feb 2010 10:26 am
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The Laird



Member Since: 08 Feb 2009
Location: Gargano
Posts: 46

Italy 2009 Freelander 2 TD4 HSE Auto Lago Grey

xtattsbox wrote:
The Laird wrote:

So my question is:

What are the effects/consequences of slipping an automatic into Neutral at speed and do you need to touch the brake pedal to achieve it?


Erm death, eventually.


Big Cry

but can anyone answer the question, so I know why I died? 09 HSE Auto Lago Grey/Almond Napoli. Privacy glass.

Post #58921 10th Feb 2010 10:27 am
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mcphersonstrut



Member Since: 21 Jul 2009
Location: In the land of 2 wheel drive and 60mpg
Posts: 2164

England 2008 Freelander 2 TD4 HSE Auto Stornoway Grey

The vast majority of auto drivers just hold the car on the brake just through lazyness. It takes two seconds to put the hand brake on and knock it into neutral.

a) Avoids heating up of the transmission
b) After long periods of braking the discs will be very hot, holding the car on the brakes keeps disc braking area on the pad hotter than the exposed area of the disc which will cool quicker, which is how you get warped discs
c) Shows consideration to the driver behind staring at your brake lights.
c1) Suffix to item c) if they are BMW or Merc drivers parked behind you ignore all the above and leave your foot on the brake as they will be doing the same to the driver behind them. As they are also always part of the D Censored k head crew that leave their front fog lights on all the time, this will be your payback for you having to stare at their fog lights Thumbs Up

Post #58922 10th Feb 2010 10:28 am
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The Laird



Member Since: 08 Feb 2009
Location: Gargano
Posts: 46

Italy 2009 Freelander 2 TD4 HSE Auto Lago Grey

npinks wrote:
you loose power basically, i have done this a couple of times thinking i was in command shift

keep meaning to look in the manual for the official ruling on going from drive to neutral but haven't atm


Losing power was the intention Thumbs Up 09 HSE Auto Lago Grey/Almond Napoli. Privacy glass.

Post #58923 10th Feb 2010 10:28 am
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Matthius



Member Since: 21 May 2008
Location: Warsaw
Posts: 42

Poland 2007 Freelander 2 TD4 S Auto Stornoway Grey
Re: Auto gearbox

commando wrote:
Put the car into neutral after a few seconds, not a few minutes as you will just put extra strain on the gearbox and brakes as the car is trying to set off all the time it is in drive.It makes your brake light bulbs last longer as well.


I cannot agree with that. Auto gearbox is designed to work on D - and that includes short stops. Certainly longer that few seconds.
Every auto gearbox specialist I know says, that there's no such thing as "extra strain" if D is engaged while brakes are applied.

Bear in mind, that only D provides the box with sufficent pressure for proper lubrication. Switching to P or N makes it drop from about 50psi to 5psi. Before you move again on D, it'll take some time to build up the pressure back to its working level. Now, that's actually something that may put extra strain on the gearbox - pressure applied/released/applied/released. Better keep it at a constant level, until you stop for longer than a few minutes.

Post #58925 10th Feb 2010 10:41 am
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Matthius



Member Since: 21 May 2008
Location: Warsaw
Posts: 42

Poland 2007 Freelander 2 TD4 S Auto Stornoway Grey

The Laird wrote:

but can anyone answer the question, so I know why I died?


See my post above.
On N, the gearbox will not be lubricated properly, due to the working pressure going down about 10 times. It's like running an engine with not enough oil. Death, hot and smelly. Big Cry

Post #58928 10th Feb 2010 10:45 am
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The Laird



Member Since: 08 Feb 2009
Location: Gargano
Posts: 46

Italy 2009 Freelander 2 TD4 HSE Auto Lago Grey

The Laird wrote:
I have a question and thought this might be the right thread to tag it on to.

A hot topic at the moment is the problem with accelerator stick at Toyota Whistle .

So my question is:

What are the effects/consequences of slipping an automatic into Neutral at speed and do you need to touch the brake pedal to achieve it?


Just bumping my question Thumbs Up

Can anyone answer it? 09 HSE Auto Lago Grey/Almond Napoli. Privacy glass.

Post #58929 10th Feb 2010 10:47 am
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npinks



Member Since: 28 Jun 2007
Location: Ls25
Posts: 20090

United Kingdom 

i should have added to my reply above, that you don't need to touch the brake, it just allows you to shift to neutral

whether this does any harm, i have done it at motorway speeds, without any problem, I'll let a more technical person answer Thumbs Up Former Mod/Member, with the most post & Chicken George Arch nemesis

Post #58938 10th Feb 2010 11:08 am
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xtattsbox



Member Since: 26 Jan 2010
Location: Suffolk
Posts: 413

United Kingdom 2008 Freelander 2 TD4 HSE Auto Stornoway Grey

The Laird wrote:
The Laird wrote:
I have a question and thought this might be the right thread to tag it on to.

A hot topic at the moment is the problem with accelerator stick at Toyota Whistle .

So my question is:

What are the effects/consequences of slipping an automatic into Neutral at speed and do you need to touch the brake pedal to achieve it?


Just bumping my question Thumbs Up

Can anyone answer it?


Simple. If you put the car in neutral there is no drive to the wheels, no engine braking. If anything happened that required you to react quickly, you would not be able to. The braking would rely completely on the brakes. Features like the DSC and Anti Roll over thing rely on drive to the wheels.

Sooo. Simply put, you will eventually get in a whole shed load of trouble. Hi Darling, I'll be home in 10 mins. If I'm not back, please read this message again...

Post #58942 10th Feb 2010 11:21 am
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Matthius



Member Since: 21 May 2008
Location: Warsaw
Posts: 42

Poland 2007 Freelander 2 TD4 S Auto Stornoway Grey

I guess the damage won't happen instantly, but the lack of proper lubrication will eventually build up some wear and tear within the box. Some car makers specifically warn against the practice, Subaru being among them.

For the same reason, long-distance towing on N is not advised by LR.

Post #58943 10th Feb 2010 11:21 am
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The Laird



Member Since: 08 Feb 2009
Location: Gargano
Posts: 46

Italy 2009 Freelander 2 TD4 HSE Auto Lago Grey

xtattsbox wrote:
The Laird wrote:
The Laird wrote:
I have a question and thought this might be the right thread to tag it on to.

A hot topic at the moment is the problem with accelerator stick at Toyota Whistle .

So my question is:

What are the effects/consequences of slipping an automatic into Neutral at speed and do you need to touch the brake pedal to achieve it?


Just bumping my question Thumbs Up

Can anyone answer it?


Simple. If you put the car in neutral there is no drive to the wheels, no engine braking. If anything happened that required you to react quickly, you would not be able to. The braking would rely completely on the brakes. Features like the DSC and Anti Roll over thing rely on drive to the wheels.

Sooo. Simply put, you will eventually get in a whole shed load of trouble.



Thanks xtattsbox Bow down

The situation that I was thinking of was that I was already in a shed load of trouble (as I said Toyota has a problem of sticking accelerator so what would you do if faced with the same problem?)

So, my situation is I'm driving at 70 mph (maybe in Cruise) and something jams and FL2 will not slow down. In a Manual I would select neutral (something I have done many times even without a problem).

I have never done it with an Automatic.

I still want to know if I should touch brake pedal to do it, or can I just slip it in Neutral without any consequences, other than:

a) no drive to wheels - that is what I wanted to achieve

b) no DSC and Anti Roll - I guess not but in situation I already have a prob

c) no engine braking - that's interesting; the engine is running (I haven't turned it off) so is that statement correct?

d) if c is correct, then will I have lost power steering?

Sorry, one question leads to many (but I don't want to be typing on here when it happens Whistle 09 HSE Auto Lago Grey/Almond Napoli. Privacy glass.

Post #58946 10th Feb 2010 11:46 am
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xtattsbox



Member Since: 26 Jan 2010
Location: Suffolk
Posts: 413

United Kingdom 2008 Freelander 2 TD4 HSE Auto Stornoway Grey

The Laird wrote:


So, my situation is I'm driving at 70 mph (maybe in Cruise) and something jams and FL2 will not slow down. In a Manual I would select neutral (something I have done many times even without a problem).

I have never done it with an Automatic.

I still want to know if I should touch brake pedal to do it, or can I just slip it in Neutral without any consequences, other than:

a) no drive to wheels - that is what I wanted to achieve

b) no DSC and Anti Roll - I guess not but in situation I already have a prob

c) no engine braking - that's interesting; the engine is running (I haven't turned it off) so is that statement correct?

d) if c is correct, then will I have lost power steering?

Sorry, one question leads to many (but I don't want to be typing on here when it happens Whistle


A little fatalistic if nothing else!!

a) Correct
b) It will still be there, just not as effective
c) Engine braking is achieved by the drive of the car and the compression in the engine, so that will be gone
d) Nope, the power steeering has a separate pump.

e) You have a Landrover Freelander, not a Toyota!!! Hi Darling, I'll be home in 10 mins. If I'm not back, please read this message again...

Post #58948 10th Feb 2010 11:52 am
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Matthius



Member Since: 21 May 2008
Location: Warsaw
Posts: 42

Poland 2007 Freelander 2 TD4 S Auto Stornoway Grey

The Laird wrote:
c) no engine braking - that's interesting; the engine is running (I haven't turned it off) so is that statement correct?

d) if c is correct, then will I have lost power steering?

Sorry, one question leads to many (but I don't want to be typing on here when it happens Whistle


C) YES, no braking (the transmission will not apply the torque converter, if I'm correct)
D) NO, power steering will still work.

Post #58949 10th Feb 2010 11:52 am
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commando



Member Since: 27 Apr 2007
Location: lancashire
Posts: 208

United Kingdom 2007 Freelander 2 TD4 SE Auto Stornoway Grey

Can you put the auto into neutral at 70 mph? Stornaway grey SE auto with 18" alloys

Post #58954 10th Feb 2010 12:21 pm
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alex_pescaru



Member Since: 12 Mar 2009
Location: RO
Posts: 4642

Re: Auto gearbox

Matthius wrote:
Bear in mind, that only D provides the box with sufficent pressure for proper lubrication. Switching to P or N makes it drop from about 50psi to 5psi. Before you move again on D, it'll take some time to build up the pressure back to its working level.

The internal pump of the gearbox is driven by the input shaft. So the pressure (and lubrication) is dependant on engine RPM, not the position of the selector.
You are confusing the pressure(s) needed to engage gears (the one(s) direct dependant of the status of the gearbox valves - opened, closed, PWM driven) with the pressure generated by the pump, which is always constant as long as the engine RPM is constant (you could say it "main pressure" - the one used for lubrication too).
So as long as the engine is running, the gearbox is lubricated, no matter in which position is the selector.
Indeed, it is not recomended to tow the car with engine off, because THEN the box isn't lubricated (because the input shaft and implicit the pump which is directly driven by the engine has 0 RPM) and could result in internal damage.

Post #58956 10th Feb 2010 12:25 pm
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