Car still rolls forward when in gear

JLR1969 · 03-28-2009, 02:54 PM

Following my experience with the car rolling off the handbrake and crashing the following happened today.

Parked car on an average hill and turned off the engine. Put in to first gear with the clutch de-activated.

Handbrake off and the car moved slightly as it engaged with the first gear, as to be expected.

Then after about 10 seconds it moved forward very slightly and stopped, it did this about 6 times over a minute and moved about 8 inches.

How wierd is that. Put it into reverse and it did the same thing, how is this possible.

SoYank · 03-28-2009, 02:58 PM

Put the handbrake on whenever you're not in the car.

JLR1969 · 03-28-2009, 03:01 PM

I always do

, but as it once failed I was seeing what would happen if it failed again and it was in gear.

Cafe.Racer · 03-28-2009, 03:04 PM

I always thought you incident was weird - when I park mine on a hill, when I take the handbrake off, it still won't roll off - I have to drive it away, against some braking resistance. I assumed it was some kind of extra safety, in case the handbrake comes of accidentally.

G82Dude · 03-28-2009, 03:15 PM

Put it in third...

DaveC · 03-28-2009, 03:19 PM

Shouldn't roll no matter which gear you put it in unless you are parking about 15 yards over the edge of Beachy Head.

That would concern me a little.

SoYank · 03-28-2009, 03:23 PM

Quote:

Originally Posted by DaveC

That would concern me a little.

Which one, a car rolling while in gear or someone parking over the edge of Beachy Head?

JLR1969 · 03-28-2009, 03:27 PM

I am gonna find another hill and see if it will do it again, if it does will speak to BMW.

For the last 23 years I always thought that if it was in gear it was going nowhere.

doughboy · 03-28-2009, 04:03 PM

Quote:

Originally Posted by JLR1969

Then after about 10 seconds it moved forward very slightly and stopped, it did this about 6 times over a minute and moved about 8 inches.

How wierd is that. Put it into reverse and it did the same thing, how is this possible.

Think about it man....it's obvious. If you speak to BMW about it make sure you don't do it on 1st april or they'll think you're havin a laugh.....

In-gear is just trying to turn the engine over using the cars weight. It will push the engine round slowly as compression leaks by the piston rings. Same in any manual car ever built.

Reverse is the lowest gear so its the hardest to turn the engine. 1st is similar.

Someone said 3rd, but thats even easier to roll away..

In reverse, rolling forward is turning the engine backwards BTW...

An auto-box in park physically locks the transmission, which is different to a manual.

JLR1969 · 03-28-2009, 04:20 PM

That explains that then. Thanks Doughboy

ss134 · 03-28-2009, 04:29 PM

Best advice when parked on a hill is to turn the front wheels towards the
kerb. Even if everything fails and the car rolls , the car will not roll back on an incline or forward on a decline as it will be stopped when the rear or front wheels hit the kerb.

Hope you get your car sorted.

JLR1969 · 03-28-2009, 04:33 PM

Quote:

Originally Posted by ss134

Best advice when parked on a hill is to turn the front wheels towards the
kerb. Even if everything fails and the car rolls , the car will not roll back on an incline or forward on a decline as it will be stopped when the rear or front wheels hit the kerb.

Hope you get your car sorted.

Good advice thanks SS134

dxb335d · 03-29-2009, 04:26 PM

Did this last night.

Miswah tiny little Opel thing, worried bout handbrake i asked her to test leaving it in gear and it did exactly same.

03-28-2009, 02:54 PM	#1
JLR1969 Major General 1839 Rep 7,000 Posts Drives: Kubota GR1600 Join Date: Dec 2008 Location: England iTrader: (1)	Car still rolls forward when in gear Following my experience with the car rolling off the handbrake and crashing the following happened today. Parked car on an average hill and turned off the engine. Put in to first gear with the clutch de-activated. Handbrake off and the car moved slightly as it engaged with the first gear, as to be expected. Then after about 10 seconds it moved forward very slightly and stopped, it did this about 6 times over a minute and moved about 8 inches. How wierd is that. Put it into reverse and it did the same thing, how is this possible.
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03-28-2009, 02:58 PM	#2
SoYank Major General 582 Rep 7,519 Posts Drives: 2009 E90 335i MT Join Date: Mar 2006 Location: Vinton, Virginia iTrader: (1) Garage List 2009 BMW E90 335i S ... [9.00]	Put the handbrake on whenever you're not in the car. __________________ **2009 E90 335i Montego Blue · Black Leather · Burl Walnut · 6MT · US Spec** SatNav • ZPP • ZCW • 6FL • TPMS • iDrive • PDC • HWS • Xenons • BMW Assist • Power Rear Sunshade • Logic 7 European Taillights • Rear Foglamp • OEM Alarm • PicoTray • DataToys XM-DVR • Multi-view Processor Quaife ATB LSD • Short Shift Knob • Hartge Anti-Roll Bars • AP Racing Front Brakes • 19" Style 269
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03-28-2009, 03:01 PM	#3
JLR1969 Major General 1839 Rep 7,000 Posts Drives: Kubota GR1600 Join Date: Dec 2008 Location: England iTrader: (1)	I always do, but as it once failed I was seeing what would happen if it failed again and it was in gear.
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03-28-2009, 03:04 PM	#4
Cafe.Racer Captain 31 Rep 896 Posts Drives: 320d Touring Join Date: Feb 2007 Location: Nottingham, UK iTrader: (1)	I always thought you incident was weird - when I park mine on a hill, when I take the handbrake off, it still won't roll off - I have to drive it away, against some braking resistance. I assumed it was some kind of extra safety, in case the handbrake comes of accidentally. __________________ Phil
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03-28-2009, 03:15 PM	#5
G82Dude - 294 Rep 2,612 Posts Drives: M4CMxD Join Date: Dec 2008 Location: Earth iTrader: (0)	Put it in third...
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03-28-2009, 03:19 PM	#6
DaveC Captain 16 Rep 645 Posts Drives: 330 Touring Join Date: Sep 2007 Location: UK iTrader: (0)	Shouldn't roll no matter which gear you put it in unless you are parking about 15 yards over the edge of Beachy Head. That would concern me a little.
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03-28-2009, 03:27 PM	#8
JLR1969 Major General 1839 Rep 7,000 Posts Drives: Kubota GR1600 Join Date: Dec 2008 Location: England iTrader: (1)	I am gonna find another hill and see if it will do it again, if it does will speak to BMW. For the last 23 years I always thought that if it was in gear it was going nowhere.
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03-28-2009, 04:20 PM	#10
JLR1969 Major General 1839 Rep 7,000 Posts Drives: Kubota GR1600 Join Date: Dec 2008 Location: England iTrader: (1)	That explains that then. Thanks Doughboy
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03-28-2009, 04:29 PM	#11
ss134 Brigadier General 233 Rep 3,899 Posts Drives: F80 M3 Join Date: Feb 2009 Location: Germany/UK iTrader: (1)	Best advice when parked on a hill is to turn the front wheels towards the kerb. Even if everything fails and the car rolls , the car will not roll back on an incline or forward on a decline as it will be stopped when the rear or front wheels hit the kerb. Hope you get your car sorted.
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03-29-2009, 04:26 PM	#13
dxb335d The Tarmac Terrorist 1009 Rep 29,344 Posts Drives: 997.2 GT3 Join Date: Mar 2007 Location: ''Fandango Towers'' iTrader: (3) Garage List 2010 Porsche 997.2 GT3 [9.50] 2003 BMW E46 M3 [6.00] 2007 BMW E92 335D [5.50]	Did this last night. Miswah tiny little Opel thing, worried bout handbrake i asked her to test leaving it in gear and it did exactly same. __________________ 997.2 GT3
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