When DSC kicks in the light on the dash lights. When abs kicks in, no light.

The DSC button on dash will disable DSC and illuminate the triangle. Verify your DSC triangle lights when you start the car.
Are you on a low friction surface when you experience this?

A couple of diagnostic concepts:

1) pull the fuse that disables the front drive. You can confirm if the problem is from the front wheels.

2) disable DSC: if you are correct and it's working but the light isn't, you can determine if some part of the system is working or not

3) as mentioned earlier, in pretty sure it's some form of the differential trying to turn the inside wheel faster than the left; drive in a circle on low friction surface: sand on assphalt is perfect: properly operating did will allow the inside wheel to lay down a clean tire track, if the dif is putting too much torque to the inside wheel the track will not be clean.

If there is just a tiny bit of over rotation on very tight turns, as long as your tires aren't wearing it could be ok. My Camaro spun the inside wheel (with shudder) any time the surface wasn't perfect since the dif was set up to give equal power to both drive wheels.

When I lost the shudder it was time to have the dif serviced because one wheel would spin and the other would get no power. Possibly you could have less than optimal grip tires? The tires that came on wife's car I wouldn't put on an old vw bug.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)