Slip Sliding Away. Tyre And Traction Control Advice Needed

[Skyline 370GT P]

Hi

I have recently bought A 370GT P Coupe Auto.

Driving up Henri Robert's Drive Tambourine Mountain in the rain ,steep and windy, the slip light is on most of the time regardless of how smooth or slowly I drive. Doesn't inspire confidence

It is fitted with YOKOHAMA Earth 1 tyres in as new condition.

Can anyone recommend a good wet weather tyre that they have actually used.

I have asked this before but was unable to get a reply.

What does the 370GT P have in the way of traction control and what does the SNOW switch do

I bought a work shop manual ,DVD, and can't find any reference to TC or the SNOW facility

Cheers

Steven

[Ben C34]

Are front and rear tyres the same rolling diameter?

That will cause issues with traction control of they aren't.

I already told you about snow mode, it takes off in second gear. And it has traction control. What more do you want to know?

[Chris32]

As Ben says, if you've got tyres that mis-matched in terms of rolling diameter it will cause issues.

I had 225/45/18 and 265/35/18 combo and at the slightest drop of the clutch the TCS would kick in - actually it was a little dangerous as if you had to merge into traffic it would cut the power!

When the fronts needed new tyres I went to a 225/40/18 and its much happier now, you really have to drive quite hard to get the TCS working, its made it all much happier

If the tyres are the same all round (or the very similar rolling diameter) and you have issues then I'd be looking at the sensors

[Skyline 370GT P]

With the utmost respect Ben I am not sure if that is correct, if it were a manual car how would it take of in 2nd gear and with the Snow switch on it will easily chirp the tyres, in second Gear!

Regards

Steven

ps

I am not looking for an argument simple trying to understand what is happening

[colin.ssc]

I'm not sure about Snow Mode going off at second gear, what I know is snow mode limits your rev to 3k rpm

[Ben C34]

With the utmost respect Ben I am not sure if that is correct, if it were a manual car how would it take of in 2nd gear and with the Snow switch on it will easily chirp the tyres, in second Gear!

Regards

Steven

ps

I am not looking for an argument simple trying to understand what is happening

What? It's not a manual. It's an auto.

[sonicii]

I would think if it was a manual, it wouldn't have a 'snow' button..

I would expect they would all have at least TC.. if also it has VDC, it will have a VDC off button somewhere.

[nickcorr]

Try these...

See if they help..

2008-infiniti-g37- VDC.pdf 2008-infiniti-g37-om snow.pdf

When I first got my V36, I also found it slippery, but that was the tyre release agent. Once that was gone, all good. I now only get the slip light when I deserve it..

[Nightcrawler]

The extremely easy way to see what happens when you engage Snow Mode is to do it. Then you wil understand in 30 seconds what it does. And of course manuals don't have a 'transmission mode' button lol.

But yes I completely agree with the guys above - I am willing to bet you have mismatched tyres either front to back or side to side.

[Skyline 370GT P]

Thanks Nick

Would you mind telling me what tyres you are using

[niZmO_Man]

Thanks Nick

Would you mind telling me what tyres you are using

Go look at all four of your tyres. Write down the sizes and post them up here.

[PN-Mad]

And also check the pressures, and post up.

[nickcorr]

No problems.

I have Nitto Motivo 245/45/18 both front and rear, replacing the 225/50/18 front and 245/45/18 rear Chinese compliance tyres. Cannot remember the brand...

[Skyline 370GT P]

YOKOHAMA EARTH 1 225 x 18 x 50 on all corners. They are in as new condition, 34psi

Edited August 26, 2014 by Skyline 370GT P

[colin.ssc]

Pretty sure the back is too small...? Factory would have come with 245x45x18 for the rears

[sonicii]

there wouldn't be much difference in diameter between a 225/50 and a 245/45 tyre though

[colin.ssc]

Hmm, true too...ha, I can't think of anything else why the car would be slipping all the time.

[nickcorr]

225/50/18 does not fit properly on an 8.5 inch rim, as per rear of V36. Generally 8.0 is the widest wheel that would take that size comforably, unless you are going for a streached look... either way that would partially explain a wobbly rear end...

In addition the Yokaham Earth range of tyres are hippy hippy baloney greeny tyres that are optimised for fuel consumption, not grip. They also are not available bigger than 16" for AUS market,

I think what you have are the BluEarthA which is a JDM tyre, still not approved for 8.5" wheel..

I would change the tyres as a good starting point for sorting out these issues. Get with a quality set of 245/45/18 front and rear... A lot less coin and hassle than finding the wierdo 225/50/18 fronts..

[Nightcrawler]

Also consider that if your rear tyres (that are fyi significantly too narrow for even stock power levels) are actually JDM and not Australian DOT approved, if you have an accident, your insurance will NOT cover you whatsoever, as any JDM/non-DOT-approved tyres are illegal for use on Australian roads. Just something to note.

[Rockit]

Snow Mode ??

Try this: http://www.myg37.com/forums/g37-sedan/230215-the-snow-button.html