So yesterday I hear a grinding noise coming from a customer's 4 Runner as she's trying to drive away. I went over and ask if there's an issue and she she tells me that there is a problem with her 4wd system. I ask her to show me what she is trying and she says "I put it in "N" for "Normal" and it doesn't work!" After I explained it should be in "Hi" she just drove away and didn't say anything.