Traction Active On
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From: Houston Texas
Traction Active On
When I'm driving my Vette at about 70 mph in 6th gear on the freeway, my traction system active message appears arbitrarily. I'm not able to accelerate at all, but when I push the traction control button, my acceleration is restored. I do have aftermarket rims on my Vette and was curious if this would cause this error. What would cause this message to appear? Thanks for all responses!
Last edited by bocallaghan; Sep 21, 2010 at 09:43 PM. Reason: j/b
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From: Charlotte, NC (formerly Endicott, NY)
The difference between the front and rear wheel (tire) diameters is insufficient. The EBCM thinks the rear tires are spinning because they are turning faster than they are supposed to compared to the front tire speed. To avoid this issue your rear tire diameter should be about a half inch larger than the front diameter. The only way to solve this is to replace either the front or rear tires with the proper size to get the half inch difference. It will not have any impact on Active Handling as AH uses the steering, lateral G, and yaw sensors to do determine how and when to activate.
A lot of C5/C6 owners get nailed by this as the most tire and wheel providers don't understand what to avoid with these and other modern cars with different size rims in front and rear.
Bill
A lot of C5/C6 owners get nailed by this as the most tire and wheel providers don't understand what to avoid with these and other modern cars with different size rims in front and rear.
Bill
Last edited by Bill Dearborn; Sep 21, 2010 at 07:25 PM.
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From: Houston Texas
Thanks for your posts!
I have 255/30ZR20's on the front and 305/25ZR20's mounted on Vellano rims. I just ordered two more rear tires of the same size. Could I change to a different size of the rear tires to alleviate this problem?
If I leave it the way it is with the same size rims and tires on the car, could this be dangerous or cause adverse damage to the vette?
I have 255/30ZR20's on the front and 305/25ZR20's mounted on Vellano rims. I just ordered two more rear tires of the same size. Could I change to a different size of the rear tires to alleviate this problem?
If I leave it the way it is with the same size rims and tires on the car, could this be dangerous or cause adverse damage to the vette?
Last edited by bocallaghan; Sep 21, 2010 at 09:26 PM. Reason: j/b
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Joined: Sep 2010
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From: Houston Texas
The difference between the front and rear wheel (tire) diameters is insufficient. The EBCM thinks the rear tires are spinning because they are turning faster than they are supposed to compared to the front tire speed. To avoid this issue your rear tire diameter should be about a half inch larger than the front diameter. The only way to solve this is to replace either the front or rear tires with the proper size to get the half inch difference. It will not have any impact on Active Handling as AH uses the steering, lateral G, and yaw sensors to do determine how and when to activate.
A lot of C5/C6 owners get nailed by this as the most tire and wheel providers don't understand what to avoid with these and other modern cars with different size rims in front and rear.
Bill
A lot of C5/C6 owners get nailed by this as the most tire and wheel providers don't understand what to avoid with these and other modern cars with different size rims in front and rear.
Bill
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I was actually wrong it states Traction System Active in the DIC. It almost seems like the car feels that the rear wheels are spinning out of control so I am not able to accelerate when this message appears. It happened to me today again at about 60 MPH. I have to take traction contol off to regain control of acceleration.
Melting Slicks
Joined: Mar 2007
Posts: 2,391
Likes: 23
From: Santa Barbara CA
Thanks for your posts!
I have 255/30ZR20's on the front and 305/25ZR20's mounted on Vellano rims. I just ordered two more rear tires of the same size. Could I change to a different size of the rear tires to alleviate this problem?
If I leave it the way it is with the same size rims and tires on the car, could this be dangerous or cause adverse damage to the vette?
I have 255/30ZR20's on the front and 305/25ZR20's mounted on Vellano rims. I just ordered two more rear tires of the same size. Could I change to a different size of the rear tires to alleviate this problem?
If I leave it the way it is with the same size rims and tires on the car, could this be dangerous or cause adverse damage to the vette?
You are going to want to change tire sizes to get them closer to the OEM heights. As it is right now, your front tires are around 26.1 inches tall, and the rears are 26.0.
The OEM Goodyears are 25.7" in front and 26.9" in back. That is over an inch difference in tire height. The rear tires on the C6 are supposed to be taller, and the Active Handling and ABS are calibrated with this in mind.
So yeah, right now the wheel speed sensors are telling the module that your rear wheels are spinning faster than the fronts. That's not a good thing. Your front tire size is close enough that it should be okay. I've been told 0.5" plus or minus is okay. For the back, a 305/30/20 would be about as good as you are going to get. At 27.2", it will put your tire heights at the correct ratio again. You could also do a 295/30/20, which is right around 27.0 inches.
Hope this helps,
Andy
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From: Houston Texas
You are going to want to change tire sizes to get them closer to the OEM heights. As it is right now, your front tires are around 26.1 inches tall, and the rears are 26.0.
The OEM Goodyears are 25.7" in front and 26.9" in back. That is over an inch difference in tire height. The rear tires on the C6 are supposed to be taller, and the Active Handling and ABS are calibrated with this in mind.
So yeah, right now the wheel speed sensors are telling the module that your rear wheels are spinning faster than the fronts. That's not a good thing. Your front tire size is close enough that it should be okay. I've been told 0.5" plus or minus is okay. For the back, a 305/30/20 would be about as good as you are going to get. At 27.2", it will put your tire heights at the correct ratio again. You could also do a 295/30/20, which is right around 27.0 inches.
Hope this helps,
Andy
The OEM Goodyears are 25.7" in front and 26.9" in back. That is over an inch difference in tire height. The rear tires on the C6 are supposed to be taller, and the Active Handling and ABS are calibrated with this in mind.
So yeah, right now the wheel speed sensors are telling the module that your rear wheels are spinning faster than the fronts. That's not a good thing. Your front tire size is close enough that it should be okay. I've been told 0.5" plus or minus is okay. For the back, a 305/30/20 would be about as good as you are going to get. At 27.2", it will put your tire heights at the correct ratio again. You could also do a 295/30/20, which is right around 27.0 inches.
Hope this helps,
Andy
Yea that does shed some light upon the situation. I will see if discount tire will work with me on getting the right size. Too bad I had to have that old size special ordered. Would it be worth it to have the car re-calibrated for these rims with tires or can I even do that? Or, should I wait till I need a new set of tires and then go with the size that works if discount tire will work with me? Staying in my current situation couldn't damage the car could it?
Here's the pictures of the car. I have had a chance to take my own yet.
http://used.mcdavidnissan.com/detail...s-a818414.html
Last edited by bocallaghan; Sep 21, 2010 at 10:11 PM.
Melting Slicks
Joined: Mar 2007
Posts: 2,391
Likes: 23
From: Santa Barbara CA
Yea that does shed some light upon the situation. I will see if discount tire will work with me on getting the right size. Too bad I had to have that old size special ordered. Would it be worth it to have the car re-calibrated for these rims with tires or can I even do that? Or, should I wait till I need a new set of tires and then go with the size that works if discount tire will work with me? Staying in my current situation couldn't damage the car could it?
Here's the pictures of the car. I have had a chance to take my own yet.
http://used.mcdavidnissan.com/detail...s-a818414.html
Here's the pictures of the car. I have had a chance to take my own yet.
http://used.mcdavidnissan.com/detail...s-a818414.html
Nice car......
I'm not sure if you can tune out the difference in tire heights. I've never been down that road, I'm sure any of the reputable tuners who are sponsors on this board can help. Looks like you are in the Houston area. Lots of good shops in that area.
As far as hurting the car, no it is not. But at the same time, you are making the traction control and possibly the stability control system (Active Handling) worthless. I like those systems to work properly on my car.
My personal opinon is that 20" wheels are excessive for a C6 and are hurting performance/handling as well. Most guys who are into performance driving keep the 18/19 combo or switch to a 18/18 set of wheels. 20's are good for looks, but that's really it. If it were my car, I'd find a nice set of factory take-off wheels and be done with it. There are some pretty nice factory C6 wheels to choose from.
That's just my take on it. Good luck,
Andy
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Joined: Sep 2010
Posts: 53
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From: Houston Texas
Nice car......
I'm not sure if you can tune out the difference in tire heights. I've never been down that road, I'm sure any of the reputable tuners who are sponsors on this board can help. Looks like you are in the Houston area. Lots of good shops in that area.
As far as hurting the car, no it is not. But at the same time, you are making the traction control and possibly the stability control system (Active Handling) worthless. I like those systems to work properly on my car.
My personal opinon is that 20" wheels are excessive for a C6 and are hurting performance/handling as well. Most guys who are into performance driving keep the 18/19 combo or switch to a 18/18 set of wheels. 20's are good for looks, but that's really it. If it were my car, I'd find a nice set of factory take-off wheels and be done with it. There are some pretty nice factory C6 wheels to choose from.
That's just my take on it. Good luck,
Andy
I'm not sure if you can tune out the difference in tire heights. I've never been down that road, I'm sure any of the reputable tuners who are sponsors on this board can help. Looks like you are in the Houston area. Lots of good shops in that area.
As far as hurting the car, no it is not. But at the same time, you are making the traction control and possibly the stability control system (Active Handling) worthless. I like those systems to work properly on my car.
My personal opinon is that 20" wheels are excessive for a C6 and are hurting performance/handling as well. Most guys who are into performance driving keep the 18/19 combo or switch to a 18/18 set of wheels. 20's are good for looks, but that's really it. If it were my car, I'd find a nice set of factory take-off wheels and be done with it. There are some pretty nice factory C6 wheels to choose from.
That's just my take on it. Good luck,
Andy
Brandon
