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Although you've made good improvement, I wouldn't get your hopes up. They will not approve a 573 score. I'd wait til your scores get over 620 to try to refinance with DCU.
have you heard anything back?
Your making good progress on your rebuild, I would wait till you are 620 or better to refinance, it will be tough to get qualified from a credit union and you will take the hit for the inquiry. Having said that you can probably hit 620 pretty quickly so your not too far off. Keep plugging away and you'll get the loan you want.
Dont be discouraged, I was at 503 and put 10k down on my car and was financed at 18% for 72 months about a year and half later I was at 632 with the version DCU uses and was approved instantly over the phone for 54 months @ 4.7%. My car payments dropped nearly $200! On top of which I was paying an additional 50-75 depending on how tight money was that month. Also my car had about 3200 in equity. Good Luck!