traction control










Both TC and AH are on/activated each time you start the car.
One push of the TC button (aka TC off) deactivates the traction control and allows the rear wheels to spin. (required to do burnouts and helpful for drag racing to allow spin to be driver controlled)
Two pushes of the TC button within 5 seconds (aka Competitive Mode) deactivates TC and reduces the impact of full AH.
A single push of the TC button that is held for more than 5 seconds (aka No Nannies) deactivates both TC and AH.
Any subsequent push of the TC button or new ignition cycle will revert to all systems on.
For everyday normal driving, leave the TC button alone, unless you get in a situation that one of the modes is preferred.
Traction control uses the front wheel hub speed sensors against the back wheel hub speed sensors.
When the rear wheels are moving much faster than the front wheels, traction control will kick in to so the rear wheels stop spinning faster than the front wheels.
In regards to active handling, wheel hub sensors, steering wheel sensor, and Yaw/accelerometer sensor sensor are used. If the back end starts stepping out, both the motor, and even the ABS unit are used to correct the back end to pull it back in line. When you switch the car over to comp mode, TC is turned off, and in regards to the back end being able to step out, it only a touch more that the back end is allows to step out before AH will kick into try to correct the problems.
In regards to the ABS system, it has a pump in the unit, so not only will it close vavles, but will actual pump up some of the brake lines to apply the brakes on different wheels to get the car straight again.
In all off move, Both TC and AH have been completely shut off (you can now have the back end step out/swing around to be what is going down the road first), but ABS braking is never turned off.
In regards to TC, the differential on the Corvette is not the strongest, and if you start to get wheel hop, you can grenade the diff.

As for why you want to leave the nannies on/not try to run the car in comp mode on the street, AH is only gong to "try" to save you, and if the back end is allowed to step out too far before the AH tries to kick into save you/you have stayed in the throttle with wheel spin to allow one of the back tires to bite to kick the back end around, the back end may already be too far out to bring the car back straight quick enough instead.
In every one of these videos below, you can hear the motor go way, way over rev quickly without gaining the same amount of speed, meaning that the back end has broken free with TC shut off , and it's just a matter for one of the rear tires to get a bite to kick the back end around quickly. And since the rear tires are still spinning as the back end kicks out, it a very, very hard condition for even a experienced driver to get back under control isntead.
Hence once the back tires loose grip and start to spin, it really a "Game over" kind of thing, and if you don't have the experience to know when such is happening really by sound of the motor alone, then leave the TC on so the car is not trying to kill you isntead.
And again, on most cars, you can feel when the rear tires are spinning. On the vet with low profile tires, and a very tight suspension to keep the car level, you will never feel the rear tires spinning, unless the back end does start to wheel hop, and as soon as that happens, the next sound your going to hear is the diff exploding instead.
Last edited by Dano523; Jan 1, 2018 at 03:21 PM.
The Best of Corvette for Corvette Enthusiasts
Hence the guy first lights up the engine with all the nannies on and the TC kicks in to save him very quickly as the tire break free for a micro second.
He ignores that fact that there is not enough traction, and that the TC system just saved him from making a huge mistake by mashing the throttle to begin with, does the 5 second button push to turn off all the nannies (why you see him coasting for the 5 second from the first burn out try), then tries the pedal mash again with all the nannies off instead.














