This is a screwup on the part of your lawyer. She should be required to refinance the vehicle as part of the divorce settlement, not simply "get the car in the divorce" leaving the financing as is. As you have found out, this leaves you financially liable for an asset that you have no interest in. This should be addressed BEFORE the judge approves the settlement.
One other thing to make note of: most states have automatic temporary restraining orders that go into effect when someone files for divorce, that require you to leave insurance etc as is, keep paying the mortgage and car payment, etc. Who paid that bill previously? If it was you, you need to keep paying it. If it was her, then she does. One of you is likely in contempt of court. If you've suffered harm as a result of her not paying that payment, you might be entitled to some relief (but don't count on it).
