Does a co-owner of a vehicle become primary owner upon the death of the primary owner or is the estate of the decedent the new primary owner?

In the state that I live in (IN) as long as the co owner is on the title of the van then the cowner can take possesion upon death(bc he\she already owns it) That way it doesnt have to go through probate and such. We just went through this prob with my mother-in-law and my wife. We have my mother and law's van now. I hope this helps you.