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I called Ascend credit union and they ran some numbers over the phone and said they think they can refi and save me $100- $150 on my monthly payment so we are going there on monday to check. They offer 110% over retail and I would have to pay a difference of $400 so thats a great deal and a much lower payment.
I would recommend refinancing as soon as you can through a credit union- they've always offered me the best rates, even before submitting my first payment. I had a friend run into issues with being upside down in an auto loan becuase they waited to refinance and the vehicle had lost significant value over time.