Hey all,

I just got to 30K miles on my 04' and replaced the rears with Pilot Sport All Season 18's in the same size set up as the original Pilot sports. The fronts still actually have a decent amount of tread left so I left the original tires on there still for a couple more miles.

My question is this, when I push her a bit going around a fairly tight but gradual right handed curve the VDC is kicking in between at various speeds from 40mph to 80mph. The tires are not slipping whatsoever when the VDC kicks in as I have felt the difference from when it actaually nedds to kick in.

I have had the rears on now for over 800 miles so break in should not be the answer and I do ALOT of highway driving for my work so I know how to handle her in all different situations.

I have my 30K service comming up and I will have them check it out (if they can reproduce it) I was wondering if any of you have had this happen or if you might know what is causing it?

Thanks alot.

 

I had the same problem. It went away after I replaced the front tires as well. The dealer said the car's vdc is very sensitive to these kinds of thing. Check this thread I posted last week https://g35driver.com/forums/wheels-tires/48778-problem-slip-light.html

 

Yeah Buddha,

sounds like you had the exact same thing but on a left turn where mine is a right. I hate that VDC kickn in at 80mph, it is a hazzard to boot when all the sudden your breaks start to grab in the middle of a turn like that.

I am not sure those that responded to your thread, although meant well had the same occurances as we had.

I was hoping to not have to replace the fronts quite yet since the rears put me out 280 a piece. But you say that once you replaced the fronts it cleared it up for you?

Thanks Buddha

 

I replaced my rears with Dunlop Direzza DZ101s in 18 45 245 and kept the stock Pilots up front and I get the same exact thing!
Everytime I take turns even a bit agressive I get the slip light and the car instantly feels like sh't (whatever mechanism kicks in to slow you down, I guess engine braking). It doesnt feel like Im losing any traction but VDC kicks in anyway
Its really annoying!!

 

You are mixing a very sticky front tire with a not so sticky rear tire.
Not a good combination, the rear will slide out way before the fronts lose traction.

 

That is very true. I have the exact same problem but have learned to deal with it. I replaced my rear tires because it popped. The rear tires were replaced with 18's Pilot Sport A/S The rear slides out way before the front all the time when taking turns. The only thing to prevent this you have to actively steer. Meaning before you could just let the tire grip and forget about it. Now you gotta make sure the tires aren't leaning too much during a turn or the rear will slide out cause VDC to kick in. Also if you are taking a turn and you hit a bump, the rear will slide out. I planning to replace all four tires this summer because it's dangerous and irritating.

Although I dont have a problem with VDC going off above 80mph. I've taken it to 120 with this setup and was fine.

 

Not only are you mixing designs and compounds, but the tires are fresh. They still have mold release on them. They use a cooking spray type compound inside the molds when tires are made so they don't stick. This mold release will stay on a tire for the first 2-300 miles before fully worn off. This makes the tire a bit slippery for a while, tripping the VDC.

Also, they are full tread depth. Think of it as a new pencil eraser. Its not as accurate but instead squirmy when new. But as it wears the eraser becomes more precise and doesn't move around as much. Same with a tire and its new tread.

With the combined mold release and full tread depth the tire will skip around a bit until scrubbed in. Outside ambient temp will play a big roll as well. These three factors will help trip the VDC.

 

What exactly happens when VDC is engaged? Is it engine braking?
It sounds horrible and scares the **** out of me when it happens

 

hey triji, my vdc acutally kicks in when I am taking a right turn, sorry if I put left. I meant right. I think the 500 to relpace the fronts is worth it considering the fact when the VDC kicks in during the turn, it feels very dangerous. After I replaced the fronts with 245/40/18 instead of stock's 225/45/18, the ride felt nicer and VDC didn't kick in anymore.

 

The brakes pulsate, and the noise you hear is the brakes pulsating.

 

heck I always turn off the VDC when i get in the car except if it is raining out. I find the car much more fun to drive and you can actually let the back end step out a bit and pour on the gas in the turn for a much more fun drive. That being said you must know the limits of the car and the driver or you could damage your car or youself.
Have fun and drive safe.

 

i had my right rear tire replaced due to a nail puncture, and for about 2 days after the VDC was always kicking early scaring the crap out of me. ever since then, its been back to normal.

 

yeah...what he said.

XCELR8, how do you like the Kumhos?

 

^^ like them a lot actually. Great performers for the price. They start life a 9/32 so the steering response is a bit better out of the box vs. some of the others. Everyone I sell them to comes back pleased as well. Haven't road raced them yet cause they are new. Once a couple thousand miles are under their belt I might track them. Tried many tires as I have pretty good access to multiple brands and really like these

 

I have new Kumhos in the back....they seem to grip real well...haven't had any VDC mishaps with them....but then again, I'm not racing around everywhere either....I have Yokohama's in the front, which I am not sure that I like very much...I have a drift to the right and road noise, but this may be related to a wheel bearing...need to take it in....just wanted somebody's opinion that has the Kumhos...I may put those on the front soon...thanks!