I recently purchased a 2003 Ford F-350 Truck and did not trade in my current truck. It is a Ford F-250 and the dealer did not want to give me a fair trade in value. I found several things to be wrong with the new truck. The dealer acknowledged this and fixed some of them, however they would not take the truck back. In the mean time I have tried to sell my old truck and have had no luck, mostly due to economic conditions. I would like to know what all is involved if I default on my new truck loan and how much it would effect my good credit? My wife is not listed on the loan. I have so far made no payments. This is a 100% financed loan including extended warranty, sales tax and all dealer fees. I put up no collateral except the truck itself. I think my current credit score is around 650. I can not afford both payments. Any advice on this? What are my options? Thanks for the help.