Monaro 'graunch' and 'Low Traction', you know the one
Discussion
Just thought I'd post up an interesting little bit of info I observed the other day that I forgot to post up.
I've not really had any of the old noise since changing to a truetrac, so I assumed it was the old stock diff being a bit weird.
This illusion was shattered ( perhaps a bit melodramatic
) the other day when the following happened:
I was parked, stationary, in neutral, with the handbrake on, and attached to my battery was an old 540i I was attempting to jump start for a friend. I was holding the car at about 2,000 rpm, and when he tried to crank the BMW, naturally it pulled my voltage down a little nearer 12v, but, it triggered the Low Traction warning, and most strangely, it made the nasty graunching noise!
The first time it was just a brief graunch like it is when you pull away sometimes, I lifted off and it stopped immediately in reaction to the noise. I realised what it was when I saw the dash icon flashing, so wasn't too concerned as I was in neutral and not going anywhere.
It happened a second time, and I stayed at 2k rpm as before. This time it lasted for a good second or two and I was able to pay a bit more attention to where it was coming from, and to be honest it felt more like it was under my feet as opposed to behind me (confused face).
Either way, I presume it was perhaps some quirk to do with TCS / ABS or some oddity being triggered by a mixture of odd inputs from various sensors.
I just thought I'd share it as it was certainly the sound I used to get with the old diff when pulling away sometimes (accompanied by the 'Low Traction' message) but I was completely stationary, in neutral, handbrake on, so nothing was actually moving. As such, I wonder if it's in fact some sort of TCS / ABS bug?
I've not really had any of the old noise since changing to a truetrac, so I assumed it was the old stock diff being a bit weird.
This illusion was shattered ( perhaps a bit melodramatic
) the other day when the following happened:I was parked, stationary, in neutral, with the handbrake on, and attached to my battery was an old 540i I was attempting to jump start for a friend. I was holding the car at about 2,000 rpm, and when he tried to crank the BMW, naturally it pulled my voltage down a little nearer 12v, but, it triggered the Low Traction warning, and most strangely, it made the nasty graunching noise!
The first time it was just a brief graunch like it is when you pull away sometimes, I lifted off and it stopped immediately in reaction to the noise. I realised what it was when I saw the dash icon flashing, so wasn't too concerned as I was in neutral and not going anywhere.
It happened a second time, and I stayed at 2k rpm as before. This time it lasted for a good second or two and I was able to pay a bit more attention to where it was coming from, and to be honest it felt more like it was under my feet as opposed to behind me (confused face).
Either way, I presume it was perhaps some quirk to do with TCS / ABS or some oddity being triggered by a mixture of odd inputs from various sensors.
I just thought I'd share it as it was certainly the sound I used to get with the old diff when pulling away sometimes (accompanied by the 'Low Traction' message) but I was completely stationary, in neutral, handbrake on, so nothing was actually moving. As such, I wonder if it's in fact some sort of TCS / ABS bug?
MyM8V8 said:
Did you apply the E40 PCM patch yet?
Yep, it's all fully patched up. Is there a simple option that disables the TCS straight away? I tried setting the TCS disable RPM really high (i.e. if it falls below this level disable it) and the TCS enable even higher, but it's still on by default when I start the car...It's annoying pressing the button every single time
V8TFT said:
SturdyHSV said:
Yep, it's all fully patched up. Is there a simple option that disables the TCS straight away? I tried setting the TCS disable RPM really high (i.e. if it falls below this level disable it) and the TCS enable even higher, but it's still on by default when I start the car...
It's annoying pressing the button every single time
This small wiring harness will disable the TCS everytime you start the car. The TCS switch still works so you can turn it back on if you want.It's annoying pressing the button every single time
http://www.speedinc.com/shop-by-vehicle/2004-2006-...
Interesting to know that it's do-able though
bobfredstinker said:
I get this fairly regularly too. Normally happens when pulling away as you say, accompanied by the 'low traction' message. I've found that when it happens a few times in succession it is cured by turning off the traction control. I have also found it happens very occasionally when braking to a stop, and it can by physically felt through the brake pedal. Could be similar to what you were saying in your first message.
Much like everyone else, I'm unsure as to the causes. It does seem, though, like it might be some kind of gremlin in the TCS (otherwise why would turning it off make a difference?), but I can't really imagine why it would do it when not in gear and stationary!
Anyone with a non-original TCS getting it?
This is the kind of response I was hoping for, I'm inclined to agree that it felt like something ABS / TCS related, although the TCS just cuts the power in my (limited) experience with it on, it doesn't apply any sort of brake activity as far as I'm aware?Much like everyone else, I'm unsure as to the causes. It does seem, though, like it might be some kind of gremlin in the TCS (otherwise why would turning it off make a difference?), but I can't really imagine why it would do it when not in gear and stationary!
Anyone with a non-original TCS getting it?
Interestingly, the Yanks think it's shimming required on the rear wheel speed sensors... Don't see how that would have caused me an issue when stationary though
http://www.ls1gto.com/forums/archive/index.php/t-1...
http://www.ls1gto.com/forums/archive/index.php/t-1...
First Google result...?
http://www.autovaux.co.uk/product/90278359-shim.as...
Continuing on...
http://www.partsbase.org/parts/gen-90278359/
Which leads to:
http://www.partsbase.org/parts/ope-530804/
http://www.autovaux.co.uk/product/90278359-shim.as...
Continuing on...
http://www.partsbase.org/parts/gen-90278359/
Which leads to:
http://www.partsbase.org/parts/ope-530804/
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