Thanks for your responses. I'll look into it further. But I must say, there has to be some recourse for a good father whose dealing with a bitter woman.
There is. You file for divorce and ask for equitable division of the marital assets.
What you're doing will not get you any more than you would get if you do it the right way - but there's a down side (see below). If you sell it now, you will have to give her half the proceeds. If you sell it after the divorce, you will have to give her half the proceeds. If she keeps it, she will have to reimburse you for half of the equity. No difference - except that doing it the right way will save your butt.
So, if "snatching" the car is that recourse, then so be it. She can purchase a new one with the chid support funds through the state. Since that was her decision to begin with.
Thanks again. This was helpful.
First, the state will not provide child support funds - you will. Even if she goes on welfare, the state will be looking to recover the money from you.
Second, child support is there to provide for the needs of the child. While Mom can legally use child support for anything she wishes as long as the child is fed and clothed, it is extremely rare that child support provides enough to support a child - and then has enough left over to buy a car.
Third, you may be committing contempt - and face jail time or other penalties if you try this. Most of the time, when someone files for divorce, there are default orders in place that forbid you from disposing of any marital assets. If you sell the car without court permission, you may be facing a very angry judge.
Fourth, as you were told, if taking away your stbx's transportation means that she loses a job or is unable to search for one, it will backfire. Your child support will be higher. You may end up paying some (or more) alimony. And you may face other penalties.
Finally, MI is an equitable division state - which means that the judge divides the property in a manner designed to be as fair as possible. You may find that if you pull a stunt like this that the judge would give your stbx the FULL value of the car and not just half.
Don't do it. There's no benefit and a huge potential down side.