traction control activates at 60 mph

[386Motoring]

I recently had a blowout in the rear of my LS. Now when i drive it the Traction control activates even if i disengage it and reduces power output from the motor. Doesn't matter how much i throttle, it will wither and slowly decrease speed. As soon as i come to a stop or a reasonably low speed then i'm able to go back again. Sometimes the power is reduced and like the other night it had me goign 45 mph on the highway just to get back home. Any advice would be great I've searched a bit and i have reason to believe that it might be the tires i put on. I changed the two front tires to a 245/40/18 and the rear are 225/40/18. I ordered two more tires and i wasn't sure if the different size tires would affect it. I just want to be armed with some kind of knowledge before i bring this car to the shop. Thank you everyone

,Phil

 

[NYC LS8]

Probably the car's systems seeing different revs per mile between the front and back and kicking it on? Although the difference in sidewalls isn't all that much. I'd get the other two on first before taking it anywhere just to make sure that's not it.

http://www.riverviewtire.com/Tireheightchart.html

 

[386Motoring]

It was funny though... i completely forgot that the front tires are now a different size. I guess it would make a difference with the electronics somewhere. I just replaced this transmission during the summer... was just hoping it wasn't that again. Thanks for the reply. I will get the new tires and update the thread when i find results.

 

[Frogman]

That's only 2.4% faster than the front tires. I wouldn't think the traction control system is that accurate, but... you never know.

784 R/Mile on the fronts
803 R/Mile on the rears.

You check the ABS sensor on the side that blew out? Maybe that got damaged or knocked loose.

 

[NickT88LSC]

Mine does that at 90 when I have the winter tires/wheels on due to having diff. front and rear size tires

 

[Frogman]

And on a side note, maybe your engine suddenly picked up an extra 400HP out of nowhere, and the traction control is just doing it's job.

 

[386Motoring]

Mine does that at 90 when I have the winter tires/wheels on due to having diff. front and rear size tires

Thank you guys That makes me feel alot better. I really can't stand bringing vehicles to the shop

 

[1LoudLS]

You check the ABS sensor on the side that blew out? Maybe that got damaged or knocked loose.

+1 the sensor was my first guess.

 

[386Motoring]

I changed the rear tires now to match the front and its all better Just wanted to update you guys.

I did check the ABS sensors at first cause i changed the front ball joints and did have to remove the sensors. I was careful not to touch them or damage them but you know how those things go

Thanks everyone for the advice... Easy fix.