My dad will sign my car title over to me, but my mom will not; what do I do, now?

All of this takes place within the state of NJ, though I am moving to Virginia shortly, if that proves helpful. Back in 2007, I was involved in a car accident that totaled my '99 VW Passat. My parents received an insurance check for that car. I took that check plus my own money to buy my present car, an '04 Saturn Ion. Because I was a minor at the time, the title for the Ion was put into both my dad's and mom's names. Fast forward to the present day- I am getting ready to move to Virginia for grad school, and can support myself. I realized that because I'd be a resident, I'd need to register the car down there, so I have been trying to get the title to this car. Mom and Dad, however, are going through a terrible divorce, one in which I have become estranged from my mother. Dad is more than willing to sign the title and transfer it to me; she refuses. To clarify, I've maintained the car with my own money; all repairs, fuel, etc have come out of my pocket. What recourse do I have?