So I was driving up into my driveway and since i can't park inside the garage i park to the side so my sister can go in and out of the garage easily. So I just drive over the curb and usually I do it with ease, but today the 4runner slipped (apparently) when i began to drive over the curb. The little light came on and i heard like a metal scraping the curb for a second. Basically what I'm asking is if this is normal and what IS the "limited slip differential traction control" feature?