Best of luck to you. I cringe at the idea of a $420 car payment on a $8500 car. I was looking at a $24,000 car and the payment was $420 for four years so, that scares me. Hopefully you follow through with everything. $400 a month of wiggle room isn't a whole lot and honestly, I would've just waited a year and taken that $820 ($400 wiggle room you have now + your new $420 a month payment) and applied it to your debt. Undoubtedly using the techniques described on this website you could've been debtfree in a year and had, on top of a years worth of ontime payments, much better credit and that $420 car payment could've been closer to $200.
All I can say is fix your credit and refinance it asap.
