Re: Can my 10 year ex partner father of my 4 children take away my van that is under his name?
I would definitely have a lawyer review the situation if the vehicle is in the man's name, not yours.
You may also want to be very careful about keeping that vehicle in the mix. The following book shares some pretty tricky scenarios that happened to the author re: vehicles that they and their spouse owned:
https://www.amazon.com/dp/1693393220
If you have a way to start fresh and get one in your own name, even if used, you will probably be much better off in the long run.