Will I be able to refinance my car?

Okay so my dad and brother put their name on a car that I pay for I didn't have a full time Job so I didn't qualify, I haven't miss a payment on the car I've had it for a year and half now and I wanted to refinance it but I wanted to put it under my name and my dada since I've had a full time job for a year now but my credit is not good cause I haven't payed a credit card debt I don't know if that will jeopardize it? Thanks